Response to Drought Stress of Two Strawberry Cultivars (cv. Kurdistan and Selva)
Response to Drought Stress of Two Strawberry Cultivars (cv. Kurdistan and Selva)
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DOI：
10.1007/s13580-011-0019-6
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发表时间：
2011-02-01
影响因子：
2.4
通讯作者：
Siosemardeh, Adell
中科院分区：
文献类型：
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作者：
Ghaderi, Nasser;Siosemardeh, Adell
为了评价不同程度干旱胁迫对草莓某些生理指标的影响。在2008年夏天用盆栽草莓栽培品种‘Kurdistan’和‘Selva’进行了一个实验。实验用四种干旱胁迫处理[对照（田间持水量的75%）]进行。SI：轻度干旱胁迫（田间持水量的50%）。S2：严重干旱胁迫（田间持水量的25%）和R：一天分蘖复水]。生理参数如：叶片相对含水量（RWC）。膜稳定性指数（MSI）。净CO2同化率（A）、气孔导度（g（s））。测定了不同干旱胁迫条件下草莓叶片蒸腾速率（E）、水分利用效率（A/g（s））、叶绿素、脯氨酸和可溶性糖含量以及复水后1 d的变化。结果表明，随着土壤含水量的降低，两个品种的RWC、MSI、A、g、E和叶绿素含量均呈下降趋势。A/g，在轻度水分胁迫下最高。“库尔德斯坦”比“塞尔瓦”具有更低的A，g和E。RWC。“库尔德斯坦”的MSI和A/g值高于“热带雨林”。这些参数的恢复速度比'库尔德斯坦'塞尔瓦'。‘库尔德斯坦’叶绿素含量高于‘热带雨林’。复水后一天叶绿素没有恢复。严重干旱胁迫下脯氨酸和可溶性碳水化合物含量增加。‘库尔德斯坦’在严重干旱胁迫下脯氨酸含量高于‘塞尔瓦’。复水后一天，两个品种的多产和可溶性碳水化合物的量都有所减少。研究表明，中度干旱胁迫影响气体交换，而严重干旱胁迫影响叶绿素。脯氨酸和可溶性碳水化合物水平。
In order to evaluate the effect of different levels of drought stress on some physiological parameters in strawberry. one experiment with potted strawberry cultivars 'Kurdistan' and 'Selva' was conducted in summer 2008. The experiment was performed with four drought stress treatments [control (75% of field capacity). SI: mild drought stress (50% of field capacity). S2: severe drought stress (25% of field capacity) and R: one day tiller rewatering]. Physiological parameters such as: leaf relative water content (RWC). membrane stability index (MSI). net CO2 assimilation rate (A), stomatal conductance (g(s)). transpiration (E), water use efficiency (A/g(s)), chlorophyll, proline and soluble carbohydrate contents were measured in leaves of strawberry subjected to different drought stress conditions as well as one day alter rewatering. The results showed that RWC, MSI, A, g, E, and chlorophyll of two cultivars decreased as soil water content was reduced. A/g, was highest under mild water stress for both cultivars. 'Kurdistan' had lower A, g, and E than 'Selva'. RWC. MSI and A/g, of 'Kurdistan' were higher than 'Selva'. Recovery of these parameters was faster for 'Kurdistan than 'Selva'. Chlorophyll contents of 'Kurdistan' was higher than 'Selva'. Chlorophyll recovery didn't occur one day after rewatering. Amount of proline and soluble carbohydrates increased under severe drought stress. 'Kurdistan' had higher proline content compared to 'Selva' under severe drought stress. Amount of prolific and soluble carbohydrates were reduced in both the cultivars one day after rewatering. This study revealed that moderate drought stress affects gas exchange while severe drought stress affects chlorophyll. proline and soluble carbohydrates levels.