红砂和珍珠在不同干旱强度下的死亡风险评估和反应策略
Mortality risk assessment and response strategies of Reaumuria soongorica and Salsola passerina under varied drought intensities
[目的]干旱引起树木水力失效或碳饥饿而导致死亡,可能与干旱强度相关。然而,有关荒漠树木在遭遇不同干旱胁迫时死亡的风险及其抗旱策略的报道仍然很少。[方法]本试验在遮雨棚中移植了红砂和珍珠进行盆栽试验,并在经过 3种水分处理(即,充分供水,慢速干旱和快速干旱)后测定了与水和碳相关的生理性状。[结果](1)与充分供水处理相比,慢速干旱处理下红砂的边材(KS)和叶比导率(KL)无显著变化,而在快速干旱处理下显著降低,珍珠的KL有一致的变化。红砂和珍珠的导…查看全部>>
[Objective]Drought-induced tree mortality,resulting from hydraulic failure or carbon starvation,is hypothesized to be modulated by specific drought intensities.However,there is a paucity of studies investigating the risk of mortality in desert trees under various drought stresses and the corresponding strategies employed for drought resilience.[Method]We conducted an experiment involving the transplantation of Reaumuria soongorica and Salsola passerina into …查看全部>>
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