限水和淹水对杂交桃树砧木光合活性的影响

E. G. Martinazzo, A. T. Perboni, M. Farias, V. Bianchi, M. A. Bacarin
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引用次数: 17

摘要

本研究旨在评价水淹和限水(干旱)对杂交砧木‘GxN-9’植株光合活性的影响。× Prunus persica L. Bastsch),生长在温室里。对植株生长约12个月的叶绿素荧光和气体交换进行了分析。两种胁迫下光合活性的降低与羧化效率的降低有关,但不影响内部二氧化碳浓度。jip测试参数揭示了能量通量过程的变化,表明在淹水条件下,GxN-9的光合性能速率显著降低,导致净同化速率显著降低。jip测试分析可以有效地确定洪水响应的阈值,证明了作为胁迫耐受性生理标志的光合活性的探索是有用的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photosynthetic activity in the rootstock of hybrid peach trees submitted to water restriction and flooding
This study aimed to evaluate the effect of flooding and water restriction (drought) on the photosynthetic activity in plants of the hybrid rootstock 'GxN-9' (Prunus dulcis Mill. × Prunus persica L. Bastsch), grown in a greenhouse. Chlorophyll fluorescence and gas exchange were analyzed in plants of approximately 12 months. The reduction of photosynthetic activity in both the stresses were associated with decreased carboxylation efficiency, but without affecting the internal concentration of carbon dioxide. The JIP-test parameters revealed changes in the energy flux processes demonstrating that in terms of flooding the rootstock GxN-9 the rate of photosynthetic performance significantly decreases, resulting in a considerable decrease in net assimilation rate. The JIP-test analysis was efficient in determining the thresholds mainly of the flood response, proving to be useful in exploration of the photosynthetic activity as a physiological marker of the stress tolerance.
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