Rubisco decrease is involved in chloroplast protrusion and Rubisco-containing body formation in soybean (Glycine max.) under salt stress
Rubisco decrease is involved in chloroplast protrusion and Rubisco-containing body formation in soybean (Glycine max.) under salt stress
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Rubisco 减少参与盐胁迫下大豆 (Glycine max.) 叶绿体突出和含 Rubisco 体的形成
DOI：
10.1016/j.plaphy.2013.11.008
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发表时间：
2014-01-01
影响因子：
6.5
通讯作者：
Jiang, Dean
中科院分区：
文献类型：
--
作者：
He, Yi;Yu, Chenliang;Jiang, Dean
盐胁迫常常导致净光合速率（Pn）下降，部分原因是 Rubisco 降解。叶绿体突起 (CP) 是 Rubisco 排除叶绿体的途径之一。为了探讨盐胁迫下Rubisco含量与CPs之间的关系，本实验以两个不同盐响应品种为对象，研究了Pn、PSII最大光化学效率(F-v/F-m)、羧化效率(CE)和Rubisco浓度、CP数和Rubisco含体(RCBs)。我们观察到，150 mM盐处理不仅导致盐敏感品种的Pn、CE和Rubisco含量显着降低，而且CP和RCB数量明显增加。在盐胁迫下，CP 的形成导致产生更多的 RCB，这些 RCB 可以迁移到液泡中并与液泡结合。这可能是盐胁迫下Rubisco快速降解的一种重要机制。我们的结论为 Rubisco 如何在盐胁迫下快速降解提供了新的视角。 (C) 2013 Elsevier Masson SAS。版权所有。
Salt stress often induces declination of net photosynthetic rate (Pn), partially resulted from Rubisco degradation. The chloroplast protrusions (CPs) is one of the pathways of Rubisco exclusion from chloroplasts. To explore the relationship between the Rubisco contents and CPs under salt stress, Pn, maximum photochemical efficiency of PSII (F-v/F-m), carboxylation efficiency (CE) and concentration of Rubisco, number of CPs and Rubisco-containing Body (RCBs) were investigated with two differently salt-responding varieties in this experiment. We observed that 150 mM salt treatment resulted in not only significant decrease in Pn, CE and Rubisco content, but also obvious increase in the number of CPs and RCBs in salt-sensitive variety. Under salt stress formation of CPs resulted in production of much more RCBs, which could immigrate into and combine with vacuole. It may be a kind of important mechanism for rapid degradation of Rubisco under salt stress. Our conclusion provides a new sight for how Rubisco can be fast degraded under salt stress. (C) 2013 Elsevier Masson SAS. All rights reserved.