Photoperiod-controlling Guttation and Growth of Rice Seedlings Under Microgravity on Board Chinese Spacelab TG-2
Photoperiod-controlling Guttation and Growth of Rice Seedlings Under Microgravity on Board Chinese Spacelab TG-2
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TG-2空间实验室微重力条件下水稻幼苗光周期控制的发育与生长
DOI：
10.1007/s12217-018-9644-3
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发表时间：
2018
影响因子：
1.8
通讯作者：
Huiqiong Zheng
中科院分区：
文献类型：
--
作者：
Lihua Wang;Fei Han;Huiqiong Zheng
已经证明，通过参与水的运输，排水在控制植物的生长和发育中起着至关重要的作用，但这种水在植物中从根到叶的运输如何对抗重力的作用仍然未知。本研究的目的是评价微重力对中国空间实验室“通宫2号”（TG-2）上水稻（Oryza sativaL.）幼苗光周期调控的发芽和生长的影响。在微重力和地面条件下，水稻幼苗的生长速率与气孔率密切相关，在16 h长日（LD）和8 h短日（SD）光周期条件下，微重力都提高了气孔率。此外，与SD处理相比，LD处理下TG-2水稻的枯败现象更为显著。上述结果表明，微重力对水稻幼苗光周期调控生长的影响可能与空间光周期调控增强有关。
Guttation has been shown to play a crucial role in controlling plant growth and development by involvement of the transport of water, but how does this water transport in plant from roots to leaves work against pull of gravity is still unknown. The aim of the present study was to evaluate the influence of microgravity on photoperiod-controlling guttation and growth of rice (Oryza sativaL.) seedlings on board the Chinese Spacelab TongGong-2(TG-2). The growth rate of rice seedlings was closely correlated with guttation under both the microgravity and the ground conditions, which was increased by microgravity under both a 16-h long-day (LD) and an 8-h short-day (SD) photoperiod conditions. In addition, guttation of the TG-2 grown rice under the LD condition was more significant in comparison with that under the SD condition. These results indicated that microgravity affected the photoperiod-controlling growth of rice seedlings could be related to the enhanced guttation in space.