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苏打盐碱胁迫对甜高粱植株有机酸含量的影响

戴凌燕1,唐呈瑞1,殷奎德1,阮燕晔2,张立军2**   

  1. 1黑龙江八一农垦大学生命科学技术学院, 黑龙江大庆 163319; 2沈阳农业大学生物科学技术学院, 沈阳 110866)
  • 出版日期:2015-03-10 发布日期:2015-03-10

Effects of saline-sodic stress on organic acid in sweet sorghum.

DAI Ling-yan1, TANG Cheng-rui1, YIN Kui-de1, RUAN Yan-ye2, ZHANG Li-jun2**   

  1. (1College of Life Science and Technology, Heilongjiang Bayi Agricultural University, Daqing 163319, Heilongjiang, China; 2College of Biological Science and Technology, Shenyang Agricultural University, Shenyang 110866, China)
  • Online:2015-03-10 Published:2015-03-10

摘要:

为确定以Na2CO3和NaHCO3为主要成分的苏打盐碱胁迫对甜高粱植株有机酸含量的影响,研究了盐碱胁迫下甜高粱品种314B和M-81E地上部和根部有机酸含量变化及磷酸烯醇式丙酮酸羧化酶(PEPC)活性。结果表明:盐碱胁迫后,甜高粱地上部和根部均检测到草酸、酒石酸、甲酸、丙酮酸、苹果酸、乳酸、乙酸及柠檬酸等8种有机酸,琥珀酸仅在根中被检出;在苏打盐碱胁迫后,除极少数有机酸含量略微增加外,其余各酸含量降低,且随胁迫浓度增加含量下降程度增大;低浓度胁迫时PEPC酶活性升高,而高浓度时则降低;有机酸含量与PEPC酶活性不存在相关性,但PEPC酶活性升高,有机酸含量下降幅度小,反之,有机酸含量大幅下降;从有机酸含量及PEPC酶活性可以看出,耐性强品种M-81E受苏打盐碱胁迫的伤害小于耐性弱品种314B。
 

关键词: 挥发性组分, 红蓝光, 促早栽培, 蓝光, 紫外光, 葡萄

Abstract:

In order to understand the effects of salinesodic (based on the composition of Na2CO3 and NaHCO3) stress on the organic acid contents in sweet sorghum plant (Sorghum dochna (Forssk.)), the changes of organic acid contents and phosphoenolpyruvate carboxylase (PEPC) activities in above and underground parts of sorghum varieties 314B and M-81E were studied. The results showed that eight different acids (i.e., oxalic acid, tartaric acid, formic acid, pyruvic acid, malic acid, lactic acid, acetic acid, and citric acid) were detected from both of the above and underground parts, while succinic acid was only found in the roots under salinesodic stress. Meanwhile, the levels of most organic acids decreased with the increment of stress level, whereas few of them increased slightly. The PEPC activity increased at low salinesodic concentration, but decreased at high salinesodic concentration. There was no correlation between organic acid level and PEPC activity. Nevertheless, when the PEPC activity increased, the decreasing rate of organic acids changed slightly and vice versa. In terms of the levels of organic acid and PEPC activity, M-81E (stronger tolerance) suffered a weaker damage than 314B (lower tolerance) under salinesodic stress.
 

Key words: protected cultivation to promote early maturing, volatile compounds, grape, blue light, ultraviolet light, red-blue light