期刊
CHILEAN JOURNAL OF AGRICULTURAL RESEARCH
卷 77, 期 1, 页码 78-86出版社
INST INVESTIGACIONES AGROPECUARIAS
DOI: 10.4067/S0718-58392017000100010
关键词
Carbonic anhydrase activity; growth; re-watering; salt stress; photosynthetic traits
资金
- project of the National Natural Science Foundation of China [31301243]
- national key basic research program (973) special projects [2013CB956701]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- research foundation for introduce talents of Jiangsu University [13JDG030]
Salinity is one of major environmental problem which is limiting the agricultural production. This research was conducted to evaluate the effect of re-watering on Brassica napus L., and determination of an appropriate regime for dilution of salted water by studying photosynthetic and growth response of B. napus to salt stress and subsequent re-watering. Plants were treated with NaCl (Nc(1): 2.5, Nc(2): 5, Nc(3): 10; g L-1); Na2SO4 (Ns(1): 2.5, Ns(2): 5, Ns(3): 10; g L-1) and mixed salts treatments (M-1: Nc(1)+ Ns(3); M-2: Nc(3)+ Ns(1); M-3: Nc(2)+ Ns(2); g L-1) and 0 as control, followed by re-watering. In salt stress phase, maximum reduction in net photosynthetic rate (P-N) was noted 79.54%, 80.72%, 84.54%, and 74.84% for Nc(3), Ns(3), M-1 and M-2, respectively, under high concentration levels. To maintain P-N, carbonic anhydrase (CA) activity was stimulated and kept water status stable under low (Nc(1) and Ns(1)) to medium concentration levels (Nc(2), Ns(2) and M-3), and the decreases in P-N under Nc(2), Ns(2) and M-3 were 48.28%, 55.58% and 58.69%, respectively. However, during rewatering phase, growth and physiological parameters were recovered well due to regulation of CA activity under low to medium concentration levels. Relatively as compare to other stress levels more recovery in PN was found after re-watering under medium concentration levels, which were 44.94%, 53.45% and 63.04%, respectively. Though aimed at consideration of high production in B. napus, the best re-watering time was found to be when plants undergo medium concentration levels. Therefore, this study provides a new method for dilution of saline irrigation based on plant physiology.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据