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首页> 外文期刊>Acta Physiologiae Plantarum >Tolerance of two apple rootstocks to short-term salt stress: focus on chlorophyll degradation, photosynthesis, hormone and leaf ultrastructures
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Tolerance of two apple rootstocks to short-term salt stress: focus on chlorophyll degradation, photosynthesis, hormone and leaf ultrastructures

机译：两个苹果砧木对短期盐胁迫的耐受性：专注于叶绿素降解，光合作用，激素和叶超微结构

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摘要

To elucidate the salt tolerance of Malus halliana Koehne and Malus robusta Rehd., changes of photosynthetic parameters, hormone content and chlorophyll degradation enzymes of them were compared after treated with different concentration of NaCl. Salt stresses were simulated using 50, 100, 200mM of NaCl solution, and 1/2 Hoagland nutrient solution was used instead of NaCl solution as control (CK). Except for the indole acetic acid (IAA) content, the changes of Chlorophyll (Chl) content, net photosynthetic rate (P-N), stomatal conductance (g(s)), IAA/ABA ratio, intercellular CO2 concentration (C-i), transpiration rate, abscisic acid content (ABA), Pheophytinase (PPH) and Pheophorbide a monooxygenase (PaO) in Malus halliana were lower than those in Malus robusta under 100 and 200mM NaCl condition. The values of Chlase, PPH and Pao in Malus robusta were significantly higher than that in Malus halliana. According to correlation analysis, the Chl was extremely positively correlated with Chla, Chlb, IAA/ABA, P-N and g(s), significantly negative correlation with Chla/b, ABA and PaO, and negative correlation with C-i, Chlase and PPH. The chloroplast ultrastructure of Malus robusta was greatly damaged resulting in chloroplasts disintegration and that of Malus halliana was maintained to be completed at 100 and 200mM NaCl. In certain range of salt concentrations, Malus halliana could be better to adjust the levels of Chlorophyll content, Chlase, PPH, PaO and the number of starch grain and osmiophilic granules to relieve the damage of photosynthetic system due to salt stress. In a word, the Malus halliana could be better adapted to high salt concentration than Malus robusta.
机译：阐明Malus Halliana Koehne和Malus Robusta Rehd的耐盐性，在用不同浓度的NaCl处理后比较它们的光合参数，激素含量和叶绿素降解酶的变化。使用50,100,200mM的NaCl溶液模拟盐胁迫，使用1/2的Hoagland营养溶液代替NaCl溶液作为对照（CK）。除吲哚乙酸（IAA）含量外，叶绿素（CHL）含量的变化，净光合速率（PN），气孔导率（G（S）），IAA / ABA比，细胞间CO 2浓度（CI），蒸腾率，脱离酸含量（ABA），苯酚丁酶（PPH）和酚醛树脂在Malus Halliana的单氧基酶（Pao）低于100和200mM NaCl条件下的Malus Robusta那些。 Malus Robusta的Chlase，PPH和PAO的值显着高于Malus Halliana。根据相关性分析，CHL与CHLA，CHLB，IAA / ABA，P-N和G（S）非常呈正相关，与CHLA / B，ABA和PAO显着负相关，以及与C-I，CHlase和PPH的负相关性。 Malus Robusta的叶绿体超微结构受到大大损害，导致叶绿体崩解，并且在100和200mm NaCl下保持Malus Halliana的崩解。在某些范围的盐浓度下，Malus Halliana可以更好地调整叶绿素含量，Chlase，PPH，PAO和淀粉晶粒数量的水平，以减轻由于盐胁迫引起的光合体系的损伤。总之，Malus Halliana可以更好地适应高盐浓度而不是Malus Robusta。

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