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首页> 外文期刊>African Journal of Biotechnology >Growth, ectomycorrhization and biochemical parameters of Quercus suber L. seedlings under drought conditions
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Growth, ectomycorrhization and biochemical parameters of Quercus suber L. seedlings under drought conditions

机译：干旱条件下栎属幼苗的生长，外生菌根和生化参数

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Drought conditions are the major constraint to the early establishment of Quercus suber species. However, drought responses of this species depend on provenances. The objective of this study was to obtain more comprehensive knowledge on the influence of drought conditions on the response of Q. suber L. seedlings originating from Algeria. Soil water status in soil (SWC) and relative water content (RWC) in leaves, morphological parameters for growth evaluation and physiological parameters, and ectomycorrhization were evaluated in two plots of seedlings: watered (W) and none watered (NW). Ten weeks of water starvation induced a reduction in RWC, ectomycorrhization rate and height and diameter growth of none watered seedlings. Under drought conditions, both soluble sugars and proteins were enhanced while polyphenols and %N decreased. The reduction of soil water content was negatively correlated with carbon isotope discrimination. The survival of the seedlings under these drought conditions was due to two strategies: osmotic adjustment through soluble sugars and proteins accumulations in leaves and an increase in carbon discrimination which enhances the water use efficiency (WUE).
机译：干旱条件是早期形成栎属物种的主要限制因素。但是，该物种的干旱反应取决于种源。这项研究的目的是获得更多有关干旱条件对源自阿尔及利亚的Q.suber L. L.幼苗响应的影响的综合知识。在两个幼苗区：浇水（W）和不浇水（NW）中，评估了土壤中的土壤水分状况（SWC）和叶片中的相对含水量（RWC），用于生长评估的形态学参数和生理参数以及外生菌根。缺水十周导致未浇水幼苗的RWC，外生菌根结节率以及高度和直径生长减少。在干旱条件下，可溶性糖和蛋白质均得到增强，而多酚和％N均下降。土壤含水量的减少与碳同位素判别负相关。在这些干旱条件下，幼苗的存活取决于两种策略：通过可溶性糖和蛋白质在叶片中的积累来进行渗透调节，以及碳分辩率的提高，从而提高了水分利用效率（WUE）。

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