期刊论文

Key Stage of As Accumulation in Rice Under As Stress at Different Growth Stages

Zhou, Hang(zhouhang4607@163.com);Gu, Jiao-Feng(gujiaofeng@163.com)

中文

环境科学

0250-3301

2020

41

10

4726-4732

10.13227/j.hjkx.202004087

2018JJ3881:湖南省自然科学基金 2016YFD0800705:国家重点研发计划 kq1901138:长沙市科技计划

本校为第一机构

水稻不同生育期对As的吸收累积差异明显.为研究水稻糙米As累积的关键生育期,明确不同生育期吸收累积As对糙米As累积的贡献,本研究通过水培试验,分别在水稻分蘖期(30 d) 、拔节期(16 d) 、孕穗期(13 d) 、灌浆期(17 d) 、蜡熟期(15 d) 、成熟期(13 d)和全生育期(104 d)添加外源As,及不添加外源As处理作为对照CK.结果表明:①不同生育期As胁迫对水稻植株生物量有显著影响,与对照CK相比,单一时期As胁迫处理中仅分蘖期As胁迫处理下植株生物量增加,其他处理均降低,其中孕穗期As胁迫处理最低,所有单一时期As胁迫处理植株生物量均高于全生育时期As胁迫下植株生物量; ②6个单一时期As胁迫处理糙米中As含量...

The absorption and accumulation of As at different stages of rice growth are significantly different. To study the key growth stages of As accumulation in brown rice and to determine the contribution of As accumulation at different growth stages to As contribution in brown rice, a rice hydroponics experiment was carried out by adding external As during the different rice growth stages: tillering stage (30 d), jointing stage (16 d), booting stage (13 d), filling stage (17 d), dough stage (15 d), maturity stage (13 d), and full growth period (104...