期刊论文

Effect of Shading on Photosynthetic Characteristics and Anatomical Structure in Leaves of Phoebe bournei Seedlings

中文

西北植物学报

1000-4025

2019

39

7

1221-1229

10.7606/j.issn.1000-4025.2019.07.1221

湖南省重点研发项目(2017NK2221) 湖南省林业厅项目(XLC201701-2).

本校为第一机构

以2年生闽楠幼苗为材料,探讨不同遮荫处理[0(CK,全光照)和30%、50%、70%遮荫]对闽楠[ Phoebe bournei (Hemsl.) Yang]幼苗光合作用及其叶片解剖结构的影响,为闽楠的合理栽培及人工林混交树种的配置提供理论依据。结果表明:(1)与全光照处理(CK)相比,闽楠幼苗叶片净光合速率( P n)、蒸腾速率( T r)、气孔导度( G s)、最大净光合速率( P nmax )、光饱和点(LSP)、光补偿点(LCP)及暗呼吸速率(Rd)均随遮荫强度的增加而显著下降;在30%和50%遮荫下,幼苗能通过提高水分利用效率(WUE)和表观量子效率(AQY),增加叶绿素含量来充分利用弱光环境;70%遮荫处理则影响闽楠幼苗的正常生长。(2)遮荫降低了闽楠幼苗叶...

The effects of shading treatments [0(CK, full light), 30%, 50% and 70% shading] on photosynthesis and anatomical structure in leaves of 2-year-old Phoebe bournei seedlings. It provides a theoretical basis for the rational cultivation and the tree species arrangement in plantations of P. bournei . The results showed that:(1) the net photosynthetic rate ( P n), transpiration rate ( T r), stomatal conductance ( G s), maximum net photosynthetic rate ( P nmax ), light saturation point (LSP), light compensation point (LCP) and dark respiration rate ( R d) of seedlings significant decreased in shadin...