期刊：
FRONTIERS IN ECOLOGY AND EVOLUTION,2023年11:1085272 ISSN：2296-701X
通讯作者：
Li, JP
作者机构：
[Tang, Tao; Li, Jiping] Cent South Univ Forestry & Technol, Fac Forestry, Changsha, Peoples R China.;[Tang, Tao; Li, Jiping] Cent South Univ Forestry & Technol, Key Lab State Forestry Adm Forest Resources Manage, Changsha, Peoples R China.;[Tang, Tao; Li, Jiping] Cent South Univ Forestry & Technol, Key Lab Forestry Remote Sensing Based Big Data & E, Changsha, Peoples R China.;[Tang, Tao; Li, Jiping] Cent South Univ Forestry & Technol, Res Ctr Forest Remote Sensing & Informat Engn, Changsha, Peoples R China.;[Velazquez, Javier] Univ Catolica Avila, Dept Environm & Agroforestry, Avila, Spain.
通讯机构：
[Li, JP ] ;Cent South Univ Forestry & Technol, Fac Forestry, Changsha, Peoples R China.;Cent South Univ Forestry & Technol, Key Lab State Forestry Adm Forest Resources Manage, Changsha, Peoples R China.;Cent South Univ Forestry & Technol, Key Lab Forestry Remote Sensing Based Big Data & E, Changsha, Peoples R China.;Cent South Univ Forestry & Technol, Res Ctr Forest Remote Sensing & Informat Engn, Changsha, Peoples R China.
摘要：
The reduction and fragmentation of forests due to human activities are two primary factors that have led to forest biodiversity losses. The lack of forest continuation may prevent organisms from escaping areas that are no longer habitable due to altered environmental conditions and the reduction in size of habitat regions. Therefore, protecting and promoting forest connectivity has become one of the important objectives of forest management. The forests were regarded as independent elements, and the connectivity of the forest itself was directly evaluated in previous studies. However, this approach ignores the maintenance of forest connectivity, while requiring the participation of other landscape elements. In this study, we indirectly determine the forest priority by evaluating the landscape priority by integrating analysis with the habitat suitability (HS) model, MSPA and and BCkPC and dPC(k) index. We studied the wild boar (Sus scrofa) habitats in and around Hupingshan and Houhe National Nature Reserves to illustrate the indirect evaluation method of forest priority. The results showed that forests with high priority, medium priority, low priority, and non-priority comprised 596, 64, 58 and 105 km(2), respectively, accounting for the 41.2, 2.7, 3.0, and 11.9% of the total forest area. Our research revealed that evaluating the forest priority by analysing the landscape priority was an effective method for forest priority identification, and this strategy can be used to other regions or species for the goal of identifying the forest priority for biodiversity conservation.
作者机构：
[Wang, Yiru; Tang, Tao; Liu, Zhaohua; Li, Jiping] Cent South Univ Forestry & Technol, Fac Forestry, Changsha 410004, Peoples R China.;[Wang, Yiru; Tang, Tao; Liu, Zhaohua; Li, Jiping] Key Lab State Forestry Adm Forest Resources Manage, Changsha 410004, Peoples R China.;[Wang, Yiru; Tang, Tao; Liu, Zhaohua; Li, Jiping] Cent South Univ Forestry & Technol, Res Ctr Forest Remote Sensing & Informat Engn, Changsha 410004, Peoples R China.
通讯机构：
[Tao Tang; Jiping Li] A;Authors to whom correspondence should be addressed.<&wdkj&>Research Centre of Forest Remote Sensing and Information Engineering, Central South University of Forestry and Technology, Changsha 410004, China<&wdkj&>Key Laboratory of State Forestry Administration on Forest Resources Management and Monitoring in Southern Area, Changsha 410004, China<&wdkj&>Faculty of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
关键词：
stand structure;site conditions;forest functions;structural equation model;Cunninghamia lanceolata;Phoebe bournei
摘要：
Forest stand structure (the characteristics and interrelationships of live trees) and site conditions (the physical and environmental characteristics of a specific location) have been linked to forest regeneration, nutrient cycling, wildlife habitat, and climate regulation. While the effects of stand structure (i.e., spatial and non-spatial) and site conditions on the single function of Cunninghamia lanceolata and Phoebe bournei (CLPB) mixed forest have been studied in previous studies, the relative importance of stand structure and site conditions in terms of productivity, species diversity, and carbon sequestration remains unresolved. In this study, a structural equation model (SEM) was adopted to analyze the relative importance of stand structure and site conditions for the forest productivity, species diversity, and carbon sequestration of CLPB mixed forest in Jindong Forestry in Hunan Province. Our research demonstrates that site conditions have a greater influence on forest functions than stand structure, and that non-spatial structures have a greater overall impact on forest functions than spatial structures. Specifically, the intensity of the influence of site conditions and non-spatial structure on functions is greatest for productivity, followed by carbon sequestration and species diversity. In contrast, the intensity of the influence of spatial structure on functions is greatest for carbon sequestration, followed by species diversity and productivity. These findings provide valuable insights for the management of CLPB mixed forest in Jindong Forestry and have significant reference value for the close-to-natural forest management (CTNFM) of pure Cunninghamia lanceolata forests.
作者机构：
[Xie, Zhengchang; Cao, Xiaoyu; Zhao, Wenfei; Li, Jiping; Sun, Yaping] Cent South Univ Forestry & Technol, Fac Forestry, Changsha 410004, Peoples R China.;[Cao, Xiaoyu; Li, Jiping] Key Lab State Forestry Adm Forest Resources Manage, Changsha 410004, Peoples R China.;[Peng, Yuanying] Lewis Univ, Coll Arts & Sci, Romeoville, IL 60446 USA.
通讯机构：
[Xiaoyu Cao; Yuanying Peng] A;Authors to whom correspondence should be addressed.<&wdkj&>College of Arts and Sciences, Lewis University, Romeoville, IL 60446, USA<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>Key Laboratory of State Forestry Administration on Forest Resources Management and Monitoring in Southern Area, Changsha 410004, China<&wdkj&>Faculty of Forestry, Central South University of Forestry and Technology, Changsha 410004, China
关键词：
age groups;soil depth;Chinese fir plantation;model;soil nutrients;soil fertility index
摘要：
Understanding nutrient quantity and quality in forest soils is important for sustainable management of forest resources and maintaining forest ecosystem services. In this study, six soil nutrient indicators, including soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), available phosphorus (AP), and available potassium (AK) were measured in five different aged stands of Chinese fir forests in subtropical China. A structural equation model (SEM) was developed based on these soil nutrients indicators in order to better evaluate the soil fertility index (SFI) in these studied forests. The results show that soil nutrient contents changed with the soil depth in different age groups. The SOM decreased in a specific order: over mature > mature > near mature > middle > young stands. The TN content of the soil gradually decreased with increased soil depth throughout all age groups. The SEM indicated that the TN had the highest weight of 0.4154, while the TP had the lowest weight at 0.1991 for estimating the SFI. The weights of other indicators (AN, SOM, AP, and AK) ranged 0.2138-0.3855 in our study. The established SEM satisfied the fitness reference values and was able to accurately describe the forest soil nutrient status through the SFI. The overall SFI values were significantly higher in over mature stands than in young-aged stands and in topsoil than in deeper soil in all examined forests. Soil TN, AP, and AK were the most important nutrient indicators to the evaluation of the SFI in the study sites. The results confirmed that the SEM was suitable to estimate the weights of the SFI and better describe the soil nutrient status in forests. Our research provides an innovative approach to assess a soil nutrient status and soil fertility and provides a scientific basis for accurate implementation of soil nutrient assessment in forest ecosystems.
摘要：
The transcriptomes of Agasicles hygrophila eggs and first instar larvae were analyzed to explore the olfactory mechanism of larval behavior. The analysis resulted in 135,359 unigenes and the identification of 38 odorant-binding proteins (OBPs), including 23 Minus-C OBPs, 8 Plus-C OBPs, and 7 Classic OBPs. Further analysis of differentially expressed genes (DEGs) revealed 10 DEG OBPs, with 5 (AhygOBP5, AhygOBP9, AhygOBP12, AhygOBP15 and AhygOBP36) up-regulated in first instar larvae. Verification of expression patterns of these 5 AhygOBPs using qPCR showed that AhygOBP9 and AhygOBP36 were mainly expressed in the adult stage with gradually increasing expression in the larval stage. AhygOBP5, AhygOBP12, and AhygOBP15 were not expressed in eggs and pupae, and their expression in larvae and adults showed no clear pattern. These 5 AhygOBPs may play an olfactory role in larval behavior, providing a basis for further investigation of their specific functions and clarifying the olfactory mechanism of A. hygrophila.
期刊：
Journal of Plant Growth Regulation,2023年42(11):7129-7141 ISSN：0721-7595
通讯作者：
Bo Zhou<&wdkj&>Fenghua Wang<&wdkj&>Dan Peng
作者机构：
[Tang, Weiwei; Michael, Paul Promise; Zhou, Bo; Huang, Yu; Ji, Wenjun; Chen, Min; You, Mingtong; Peng, Dan; Lv, Qiang; Chu, Hao] Cent South Univ Forestry & Technol, Fac Life Sci & Biotechnol, Changsha 410004, Hunan, Peoples R China.;[Zhou, Bo; Peng, Dan] Huitong Natl Field Stn Sci Observat & Res Chinese, Huitong 438107, Hunan, Peoples R China.;[Zhou, Bo] Natl Engn Lab Appl Technol Forestry & Ecol Souther, Changsha 410004, Hunan, Peoples R China.;[Zhou, Bo; Peng, Dan] Forestry Biotechnol Hunan Key Labs, Changsha 410004, Hunan, Peoples R China.;[Zhou, Bo] Cent South Univ Forestry & Technol, Key Lab Cultivat & Protect Nonwood Forest Trees, Minist Educ, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Bo Zhou; Dan Peng] F;[Fenghua Wang] P;Faculty of Life Science and Biotechnology, Central South University of Forestry and Technology, Changsha, China<&wdkj&>Huitong National Field Station for Scientific Observation and Research of Chinese Fir Plantation Ecosystem in Hunan Province, Huitong, China<&wdkj&>National Engineering Laboratory of Applied Technology for Forestry and Ecology in Southern China, Changsha, China<&wdkj&>Forestry Biotechnology Hunan Key Laboratories, Changsha, China<&wdkj&>Key Laboratory of Cultivation and Protection for Non-Wood Forest Trees, Ministry of Education, Central South University of Forestry and Technology, Changsha, China<&wdkj&>Yuelushan Laboratory, Central South University of Forestry and Technology, Changsha, China<&wdkj&>Physical Education College, Xinjiang Normal University, Wulumuqi, China<&wdkj&>Faculty of Life Science and Biotechnology, Central South University of Forestry and Technology, Changsha, China<&wdkj&>Huitong National Field Station for Scientific Observation and Research of Chinese Fir Plantation Ecosystem in Hunan Province, Huitong, China<&wdkj&>Forestry Biotechnology Hunan Key Laboratories, Changsha, China<&wdkj&>Yuelushan Laboratory, Central South University of Forestry and Technology, Changsha, China
摘要：
Phosphate (Pi) is an important nutrient element for plant growth and development and it plays an important role in the process of plant life activities. Nitrate is also an essential nutrient element for plant growth and a regulator of various metabolic and developmental pathways. Plant requirements for phosphate and nitrate are interdependent, and the acquisition of one of them must be balanced with the acquisition of the other. Maintaining the steady state of phosphate and nitrate content in plants is a key to the normal development of the plants. However, only a few studies have been carried out on the mechanism of how plants nitrate and phosphate homeostasis regulate. In this paper, we summarized the structure and function of an MYB-related transcription factor NITRATE-INDUCIBLE, GARP-TYPE TRANSCRIPTIONAL REPRESSOR1.2 (NIGT1.2) (also known as HHO2), it regulates phosphate and nitrate uptake in plants. Furthermore, we reviewed the molecular mechanism of NIGT1.2 regulating the dynamic balance of phosphate and nitrate in plants. Under phosphate starvation conditions, NIGT1.2 directly regulates the transcription factor of phosphate transporters PHT1.1 and PHT1.4, increasing phosphate absorption. Conversely, under nitrate starvation conditions, the expression of NIGT1.2 is inhibited by NIN-LIKE PROTEIN (NLP), the inhibition of nitrate transporter by NIGT1.2 will be eliminated, and the expression of nitrate transporter NRT1.1 is upregulated, increasing nitrate absorption. The result will provide the potential guidelines to create high phosphate and nitrate balance uptake and utilization in plants variety for sustainable agricultural and forestry development.
摘要：
Protoplasts preparation and purification have been frequently used in plant genetics and breeding studies, whereas application of protoplasts in woody plants is still in its infancy. Although transient gene expression using purified protoplasts is well-documented and widely used in model plants and agriculture crops, no instance of either stable transformation or transient gene expression in the woody plant Camellia Oleifera has as of yet been reported. Here, we developed a protoplast preparation and purification method using C. oleifera petals by optimizing osmotic condition with D-mannitol and polysaccharide-degrading enzyme concentrations for petal cell wall digestion, to reach a high efficiency of protoplast productivity and viability. The achieved protoplasts yield was approximately 1.42×10(7)cells per gram of petal material and the viability of protoplasts was up to 89%. In addition, we explored influencing factors of protoplast transformation, including concentrations of PEG4000 and plasmid DNA. The transformation efficiency of 81% could be reached under the optimized condition. This protoplast isolation and transient expression system were deployed to further identify the functional regulation of C. oleifera related genes and the subcellular distribution of their encoded products. In summary, the protoplast isolation and transient expression system we established using oil-tea tree petals is an efficient, versatile and time-saving system, being suitable for gene function characterization and molecular mechanism analysis.
摘要：
Camellia oleifera Abel is one of the four major woody oil species that produce edible oil from seeds. Nevertheless, its oil yield is comparably low, due to an imbalance in its source-sink relationship caused by its alternate bearing cycle. In this study, we conducted a pot experiment using 5-year-old C. oleifera 'Huaxin' young plants to examine the source-sink relationship and determine the optimal fruit load for oil production that ensures maximum economic value for C. oleifera. From April to October, the C. oleifera young plants were subjected to different leaf: fruit ratios: no fruit (control, CK), low fruit load (FL1, leaf:fruit ratio of 36:1), medium fruit load (FL2, leaf:fruit ratio of 18:1), and high fruit load (FL3, leaf:fruit ratio of 9:1). The results showed that the FL2 and FL3 treatments significantly reduced plant height, stem diameter, and flower bud differentiation from August to October, compared with the control. The net photosynthetic rate (Pn) and stomatal conductivity (Gs) of new leaves on clear days from June to August were decreased in the FL2 and FL3 treatments, compared with the control. Medium and high fruit loads (FL2 and FL3 treatments) and prolonged growth duration led to greater reductions in fruit size, weight, seed kernel oil content, oil production per plant, oil body volume, and distribution area, compared with the FL1 treatment. However, stearic acid and oleic acid contents were significantly higher in camellia oil obtained from the FL1 treatment than in camellia oil obtained from the FL2 and FL3 treatments. Thus, a leaf:fruit ratio of 36:1 is recommended to ensure proper C. oleifera 'Huaxin' growth and yield, and higher fruit loads should be avoided.
摘要：
High temperature and drought are the main factors restricting the increase in Camellia oleifera Abel production that can seriously harm its physiological and biochemical functions. This study aimed to explore the effect by which Ca2+ enhances the drought resistance of C. oleifera. Four-year-old potted plants of the 'Xianglin 210' variety were treated with four levels of CaCl2 solution (0, 10, 20, and 40 mmol/L) and subjected to natural drought stress. The drought levels were categorized as CS (non-drought), LD (light drought), MD (moderate drought), and SD (severe drought). The effects of drought stress on the growth and physiological-biochemical characteristics of C. oleifera were measured. Under drought stress, spraying CaCl2 solution on leaves could significantly increase the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), endogenous hormone indoleacetic acid (IAA) content, abscisic acid (ABA) content, and gibberellic acid (GA) content in organs and tissues; enhance the superoxide dismutase (SOD) activity; and decrease the concentration of intercellular carbon dioxide (Ci) and number of dehiscence fruits. Spraying 10 mmol/L CaCl2 effectively alleviates the damage of drought stress to tung oil trees. The study provides references for alleviating drought stress and increasing economic benefits in C. oleifera production.
作者机构：
[Song, Yabin] Cent South Acad Inventory & Planning NFGA, Changsha 410019, Peoples R China.;[Xiang, Jun; Wei, Wei; Wei, W] Forestry Res Inst Guangxi Zhuang Autonomous Reg, Nanning 530002, Peoples R China.;[Mo, Dengkui; Xiang, Jun; Jiang, Jiawei; Yan, Enping] Key Lab State Forestry & Grassland Adm Forest Reso, Changsha 410004, Peoples R China.;[Mo, Dengkui; Xiang, Jun; Jiang, Jiawei; Yan, Enping] Cent South Univ Forestry & Technol, Coll Forestry, Changsha 410004, Peoples R China.;[Xiang, Jun; Wei, Wei; Wei, W] Guangxi Key Lab Super Timber Trees Resource Cultiv, Nanning 530002, Peoples R China.
通讯机构：
[Wei, W ] F;Forestry Res Inst Guangxi Zhuang Autonomous Reg, Nanning 530002, Peoples R China.;Guangxi Key Lab Super Timber Trees Resource Cultiv, Nanning 530002, Peoples R China.
摘要：
Change detection is a crucial task in remote sensing that finds broad application in land resource planning, forest resource monitoring, natural disaster monitoring, and evaluation. In this paper, we propose a change detection model for cross-domain recognition, which we call CrossCDNet. Our model significantly improves the modeling ability of the change detection on one dataset and demonstrates good generalization on another dataset without any additional operations. To achieve this, we employ a Siamese neural network for change detection and design an IBNM (Instance Normalization and Batch Normalization Module) that utilizes instance normalization and batch normalization in order to serve as the encoder backbone in the Siamese neural network. The IBNM extracts feature maps for each layer, and the Siamese neural network fuses the feature maps of the two branches using a unique operation. Finally, a simple MLP decoder is used for end-to-end change detection. We train our model on the LEVIR-CD dataset and achieve competitive performance on the test set. In cross-domain dataset testing, CrossCDNet outperforms all the other compared models. Specifically, our model achieves an F1-score of 91.69% on the LEVIR-CD dataset and an F1-score of 77.09% on the WHU-CD dataset, where the training set was LEVIR-CD.
摘要：
Stachys yingzuijieensis, a new species from western Hunan, China, is described and il-lustrated. Molecular phylogenetic analyses based on three nuclear ribosomal DNA loci (ETS, ITS and 5S-NTS) recovered S. yingzuijieensis within the Stachys clade and as a sister group of S. arrecta. The two species can be easily distinguished by the morphology of lam-ina, corolla and nutlet. A key to all species of Stachydeae from China is also provided.
作者机构：
[Nguyen, Khang Sinh; Quang, Bui Hong; Linh, Le Thi Mai] Vietnam Acad Sci & Technol, Inst Ecol & Biol Resources, 18 Hoang Quoc Viet, Hanoi 10000, Vietnam.;[Nguyen, Khang Sinh; Quang, Bui Hong] Grad Univ Sci & Technol, Vietnam Acad Sci & Technol, 18 Hoang Quoc Viet, Hanoi 10000, Vietnam.;[Le, Tuan Anh] Vietnam Natl Museum Nat VAST, Mien Trung Inst Sci Res, 321 Huynh Thuc Khang, Thua Thien Hue 49000, Vietnam.;[Ngo, Duy Hoang Vu; Nguyen, Quoc Luan] Kon Ka Kinh Natl Pk, Gia Lai 61000, Vietnam.;[Wu, Lei] Cent South Univ Forestry & Technol, Coll Forestry, Changsha 410004, Peoples R China.
关键词：
Gia Lai Province;Hedyotis-Oldenlandia complex;Indochina;phylogenetics;Spermacoceae;taxonomy
摘要：
A new species of Hedyotis L. (Rubiaceae), Hedyotis konhanungensis B.H. Quang, T.A. Le, K.S. Nguyen & Neupane, is described and illustrated from the central highlands of Vietnam based on morphological and phylogenetic evidence. The new species belongs to the morphologically diverse tribe Spermacoceae (ca. 1000 species) of the family Rubiaceae, which is represented by 70-80 species in Vietnam. The phyloge-netic analysis, based on four DNA regions (ITS, ETS, petD, rps 16), confirms the new species' placement within the genus Hedyotis - one of the largest genera in the tribe, comprising ca. 180 species across Asia and the Pacific. Hedyotis konhanungensis is morphologically distinct from all southeastern Asian Hedyotis L. in its set of traits such as leaf type (shape and thickness), growth habit, and floral parts (color of inflo-rescence axis and the shape of calyx lobes). The new species shows similarities with Hedyotis shenzhenensis, H. shiuyingiae, and H. yangchunensis from China in its herbaceous habit, fleshy ovate leaf blades, and dark purple floral parts, but it is phylogenetically distinct and can be distinguished from them by the following combination of morphological traits: habit with slightly smaller stature (<25 cm), broadly ovate or deltoid stipules with cuspidate apex and entire margin, and ovate or nearly ovate calyx lobes.
