盐胁迫对4种葡萄基因型离子积累、光合作用和相容溶质含量的影响

Shabnam Heidarpour, N. Abbaspour, N. Mohammadkhani, Sanaz Mosavi pornaki
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引用次数: 1

摘要

. 研究了GharaUzum、Hosseini、AghUzum和Keshmeshi四种葡萄基因型在不同盐度(25、50和100 mM NaCl)下的耐盐性。结果表明,盐度显著(P <0.05)降低了植株各部位的生长指标,提高了植株各部位的Cl -和Na +含量。各处理的Cl -积累量均大于Na +。在所研究的基因型中,GharaUzum和Keshmeshi叶片中Cl浓度分别最低和最高。盐度使光合速率、蒸腾速率和气孔导度显著降低,并与叶片Cl -含量高度相关。GharaUzum的光合参数降低幅度较小。在中等盐度(50 mM)处理下,所有基因型叶片中可溶性糖、脯氨酸和甘氨酸甜菜碱含量均有所增加。综上所述,GharaUzum和Keshmeshi对盐胁迫的耐受性在所有基因型中分别最高和最低。
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The effect of salt stress on ion accumulation, photosynthesis and compatible solute contents in four grapevine (Vitis vinifera) genotypes
. Salinity tolerance of four grape genotypes [GharaUzum, Hosseini, AghUzum and Keshmeshi] was studied under various salinity levels (25, 50 and 100 mM NaCl). As a result, growth indices were significantly ( P <0.05) reduced by salinity, whereas Cl - and Na + contents in the plant parts were increased. Cl - accumulation exceeded than that of Na + in all treatments. Among the genotypes studied, GharaUzum and Keshmeshi had the lowest and highest Cl concentrations in the leaf lamina, respectively. Photosynthesis and transpiration rate as well as stomatal conductance were greatly reduced by salinity and were shown to be highly correlated with leaf Cl - content. GharaUzum showed lower reduction in photosynthesis parameters. Soluble sugars, proline and glycine betaine contents increased in the leaf lamina of all the genotypes studied treated with moderate salinity (50 mM). In conclusion, the results showed that GharaUzum and Keshmeshi had the highest and lowest salt stress tolerance among the genotypes studied, respectively.
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