储存期间被包装的叶子中的水损失:为什么和什么时候?
Feng Feng1,2, Shmuel Assouline1, Fulton Rockwell3
1Institute of Soil, Water and Environment Sciences, Volcani Center, ARO, Rishon LeZion, Israel.
Plant, cell & environment
|October 14, 2024
概括
由于代谢热量和水损失,在储存期间叶子的水潜力 (Ψleaf) 可以显著下降. 在4°C保存叶子并使用袋将此误差降至最低,确保更准确的生态生理学测量.
科学领域:
- 植物生态生理学植物生态生理学
- 植物生理学 植物生理学
- 环境科学环境科学
背景情况:
- 叶子水潜力 (Ψleaf) 是植物生态生理学的关键指标.
- 标准协议通常涉及数小时的叶子储存在测量之前的样本后采样.
- 在储存过程中引入的潜在错误尚未完全理解.
研究的目的:
- 为了识别和量化储存的叶子的水损失.
- 研究代谢热量产生对叶子水潜力的影响 (Ψleaf).
- 为了确定最佳的储存条件,以尽量减少 Ψleaf 掉落.
主要方法:
- 在受控条件下储存后测量了叶子水潜力 (Ψleaf).
- 实验对袋子材料,植物物种,相对于流损失点 (Ψtlp) 的初始 Ψleaf 和储存温度 (4°C 与 25°C) 进行了变化.
- 水的流失被分为凝结和透;叶子的温度被监测.
主要成果:
- 叶子水潜力 (Ψleaf) 下降了高达0.39MPa/小时.
- 41%-89%的流失水在袋子内部凝结.
- 塑料袋,较高的初始 Ψleaf,和25°C的储存导致更大的 Ψleaf 跌落;4°C的储存减少了60%的跌落率.
结论:
- 代谢热量产生会导致大量的水分流失和存储的叶子中的叶子下降.
- 最佳的储存包括较低的温度 (4°C),袋,以及初始 Ψleaf 的叶子较低.
- 尽量减少储存时间和优化条件对于准确的 Ψleaf 测量至关重要.
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