Submergence Causes Similar Carbohydrate Starvation but Faster Post-Stress Recovery than Darkness in Alternanthera philoxeroides Plants.
Submergence Causes Similar Carbohydrate Starvation but Faster Post-Stress Recovery than Darkness in Alternanthera philoxeroides Plants.
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在空心莲子草植物中，淹没会导致类似的碳水化合物饥饿，但应激后恢复比黑暗更快
DOI：
10.1371/journal.pone.0165193
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Zhang XP
中科院分区：
文献类型：
--
作者：
Ye XQ;Meng JL;Zeng B;Wu M;Zhang YY;Zhang XP
由于光照低，沉水植物对碳的同化作用大大降低。据推测，淹水会减少碳水化合物的含量，植物从淹水中恢复的方式与经过黑暗处理的植物相同。为了验证这一假设，研究并比较了植物对淹水和黑暗的反应。在对照实验中，耐淹水的空心莲子草的植株暴露在排水和光照良好的条件、完全淹水条件或黑暗条件下，然后恢复生长期。对植物的生物量维持和积累、碳水化合物含量动态和呼吸速率进行了评估，以量化碳水化合物利用率和再生。与暗处理相比，沉水植株保持了更高的叶绿素含量、更多的绿叶组织和更多的生物量，恢复更快，积累了更多的碳水化合物和生物量。在两种胁迫条件下，沉水植物的呼吸速率都以相同的方式持续下降，但保持在一个显著较低的水平；两种胁迫处理的总可溶性糖和总果糖含量的下降幅度大致相同，达到了相似的低水平。与黑暗相比，空心莲子草对水淹的耐受性更强。沉水植物恢复较快，不能用恢复开始时碳水化合物含量相近来解释。除了碳水化合物或其他机制外，可能还涉及其他类型的碳储备，如更高的胁迫后光合作用表现。
Carbon assimilation by submerged plants is greatly reduced due to low light levels. It is hypothesized that submergence reduces carbohydrate contents and that plants recover from submergence in the same way as darkness-treated plants. To test this hypothesis, the responses of plants to submergence and darkness were studied and compared. Plants of a submergence-tolerant species, Alternanthera philoxeroides, were exposed to well drained and illuminated conditions, complete submergence conditions or darkness conditions followed by a recovery growth period in a controlled experiment. The biomass maintenance and accumulation, carbohydrate content dynamics and respiration rate in the plants were assessed to quantify the carbohydrate utilization rate and regrowth. The submerged plants maintained higher chlorophyll contents, more green leaf tissue and more biomass; recovered more quickly; and accumulated more carbohydrates and biomass than darkness-treated plants. The respiration rate was continuously reduced in the same pattern under both stress conditions but was maintained at a significantly lower level in the submerged plants; the total soluble sugar and total fructan contents were decreased at approximately the same rate of decrease, reaching similar low levels, in the two stress treatments. The A. philoxeroides plants were more tolerant of submergence than darkness. The faster recovery of desubmerged plants could not be explained by the similar carbohydrate contents at the start of recovery. Other types of carbon reserves besides carbohydrates or other mechanisms such as higher post-stress photosynthetic performance might be involved.
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影响因子：
4.2
作者：
BOWEN, BJ;PATE, JS
通讯作者：
PATE, JS
影响因子：
5.2
作者：
Das, KK;Sarkar, RK;Ismail, AM
通讯作者：
Ismail, AM
影响因子：
7.4
作者：
BAYSDORFER, C;WARMBRODT, RD;VANDERWOUDE, WJ
通讯作者：
VANDERWOUDE, WJ
影响因子：
5.5
作者：
Vervuren, PJA;Blom, CWPM;de Kroon, H
通讯作者：
de Kroon, H
影响因子：
5.7
作者：
Das, Krishna Kaveri;Panda, D.;Ismail, Abdelbagi M.
通讯作者：
Ismail, Abdelbagi M.