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使用多种方法比较两种入侵性Tamarix种群的抗旱能力

Randall W Long¹, R Brandon Pratt², Anna L Jacobsen²

¹Department of Biology, Lewis & Clark, 615 S Palantine Rd, Portland, OR 97219, USA.

Tree physiology

|December 16, 2023

概括

塔马里克斯树苗在树叶的特征上没有差异,这表明塑性,而不是遗传变异,推动了它们在各种息地取得成功. 这种植物对栓塞的脆弱性凸显了适应需求.

科学领域:

植物生理学植物生理学
生态生态学生态生态学
木制解剖学木制解剖学

背景情况:

树特征的特定变异性和可塑性对于植物殖民多样性息地至关重要.
塔马里克斯是一种非本地木质植物,在各种干旱环境中取得了成功.

研究的目的:

为了研究塔马里克斯液压导电性,栓塞脆弱性和血管解剖学的种群差异.
为了确定与干旱期间皇冠衰退相关的水位潜力.
为了比较微型计算机断层扫描 (microCT) 和液压方法来量化液压导电性损失.

主要方法:

测量了液压导电性 (Ks),栓塞脆弱性曲线和血管解剖学 (长度,直径).
在田间种植的Tamarix.进行了一个长期干旱的试验.
使用微CT和液压方法,量化了液压导电率 (PLC) 的百分比损失.

主要成果:

在共同环境中培养的Tamarix种群之间,没有发现测量到的西勒姆特征的显著差异.
塔马里克斯表现出对栓塞的脆弱性,较大的血管表现出更高的易感性.
与液压方法相比,microCT方法高估了理论导电性,低估了PLC.
与皇冠衰退相关的水潜力与液压方法结果保持一致.

结论:

体特征的可塑性,而不是遗传差异化,可能有助于Tamarix在各种息地取得成功.
树特征可塑性是Tamarix在干旱地区适应的一个关键因素.
液压方法比微CT更可靠,用于评估栓塞引起的液压损伤.

关键词:

在HRCT中,HRCT是指HRCT.人体解剖学解剖学解剖学洞化洞化洞化沙漠的沙漠,沙漠的沙漠,沙漠的沙漠干旱干旱干旱干旱侵入性物种是一种入侵性物种.度的度是指度的度.河边的河边人河边人盐水是什么意思?盐水是什么意思?船舶直径的船体直径.船舶长度船舶长度船舶长度在Xylem中,Xylem就是Xylem.

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