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首页> 外文期刊>Turkish journal of biology >Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars
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Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

机译：盐胁迫对红花（Carthamus tinctorius L.）品种光系统II效率和抗氧化酶活性的影响

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摘要

This study was conducted to determine the tolerance of safflower (Carthamus tinctorius L.) cultivars (Din?er, Remzibey-05, and Yenice) against salt stress based on some physiological and biochemical parameters at the vegetative stage. Eighteen-day-old plants were subjected to salt stress [0 (control), 75, 150, 225, and 300 mM NaCl concentrations] for 12 days, which led to a significant decrease in growth parameters (stem growth, fresh weight, and relative water content) and the photosynthetic pigment contents of the safflower cultivars. The photochemical activities of photosystem II of the cultivars were negatively affected by salinity, especially at the highest concentration (300 mM). Salt stress decreased K+ content and K~+/Na~+ ratio while it increased Na~+ content. Malondialdehyde and free proline contents in the leaves of cultivars increased gradually in proportion to the increase of NaCl concentration. Analysis of antioxidant enzyme activities showed that these enzymes responded differently to the NaCl concentrations. Din?er, with higher antioxidant enzyme activities, had a more effective response than the other cultivars. Considering growth and biochemical and chlorophyll fluorescence parameters with the endogenous defense system, Din?er had a higher withstanding capacity against salinity than the other cultivars.
机译：这项研究是根据营养阶段的一些生理和生化指标，确定红花（Carthamus tinctorius L.）品种（Din？er，Remzibey-05和Yenice）对盐胁迫的耐受性。对18天大的植物进行盐胁迫[0（对照），75、150、225和300 mM NaCl浓度]持续12天，这导致生长参数（茎生长，鲜重和相对水含量）和红花品种的光合色素含量。盐度对品种光系统II的光化学活性有负面影响，特别是在最高浓度（300 mM）下。盐胁迫降低了K +含量和K〜+ / Na〜+比例，而增加了Na〜+含量。品种叶片中丙二醛和游离脯氨酸含量随NaCl浓度的增加而逐渐增加。抗氧化酶活性的分析表明，这些酶对NaCl浓度的反应不同。与其他品种相比，具有较高抗氧化酶活性的Diner具有更有效的响应。考虑到内生防御系统的生长以及生化和叶绿素荧光参数，Diner具有比其他品种更高的耐盐碱能力。

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