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首页> 外文期刊>Journal of Biological Physics >Changes in photosynthetic pigments and chlorophyll-a fluorescence attributes of sweet-forage and grain sorghum cultivars under salt stress
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Changes in photosynthetic pigments and chlorophyll-a fluorescence attributes of sweet-forage and grain sorghum cultivars under salt stress

机译：盐胁迫下甜牧草和高粱品种光合色素和叶绿素a荧光特性的变化。

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摘要

Water shortage leads to a low quality of water, especially saline water in most parts of agricultural regions. This experiment was designed to determine the effects of saline irrigation on sorghum as a moderately salt-tolerant crop. To study salinity effects on photosynthetic pigment attributes including the chlorophyll content and chlorophyll fluorescence, an experiment was performed in a climate-controlled greenhouse at two vegetative and reproductive stages. The experimental design was factorial based on a completely randomized design with five NaCl concentrations (control, 50, 100, 150, and 200 mM), two grain and sweet-forage sorghum cultivars (Kimia and Pegah, respectively) and four replications. According to the experimental data, there were no significant differences between two grain and sweet-forage cultivars. Except for 100 and 150 mM NaCl, salinity significantly decreased the chlorophyll index and pigment contents of the leaf, while it increased the chlorophyll-a fluorescence characteristics. Although salinity reduced photosynthetic pigments and the crop yield, either grain or sweet-forage cultivars could significantly control the effect of salinity between 100 and 150 mM NaCl at both developmental stages, showing the possibility of using saline water in sorghum cultivation up to 150 mM NaCl.
机译：缺水导致水质低下，特别是在大多数农业地区的盐水中。设计该实验的目的是确定盐分灌溉对中度耐盐作物高粱的影响。为了研究盐度对光合作用色素属性（包括叶绿素含量和叶绿素荧光）的影响，在气候控制的温室中的两个营养和生殖阶段进行了一项实验。实验设计是基于完全随机设计的因子分析，该设计具有五个NaCl浓度（对照，50、100、150和200 mM），两个谷物和甜饲高粱品种（分别为Kimia和Pegah）和四个重复。根据试验数据，两种谷物和甜食品种之间没有显着差异。除100和150 mM NaCl外，盐度显着降低了叶片的叶绿素指数和色素含量，而增加了叶绿素a的荧光特性。尽管盐分会降低光合色素和农作物的产量，但无论是谷物还是甜牧草品种，在两个发育阶段均可将盐分影响控制在100至150 mM NaCl之间，这表明在高粱NaCl培养中使用盐水的可能性高达150 mM NaCl 。

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