快速相对水含量估计。
Rapid estimates of relative water content.
机构信息
Department of Agriculture, Viticultural Research Station, Griffith, New South Wales, Australia.
出版信息
Plant Physiol. 1974 Feb;53(2):258-60. doi: 10.1104/pp.53.2.258.
Relative water content may be accurately estimated using the ratio of tissue fresh weight to tissue turgid weight, termed here relative tissue weight. That relative water content and relative tissue weight are linearly related is demonstrated algebraically. The mean value of r(2) for grapevine (Vitis vinifera L. cv. Shiraz) leaf tissue over eight separate sampling occasions was 0.993. Similarly high values were obtained for maize (Zea mays cv. Cornell M-3) (0.998) and apple (Malus sylvestris cv. Northern Spy) (0.997) using a range of leaf ages. The proposal by Downey and Miller (1971. Rapid measurements of relative turgidity in maize (Zea mays L.). New Phytol. 70: 555-560) that relative water content in maize may be estimated from water uptake was also investigated for grapevine leaves; this was found to be a less reliable estimate than that obtained with relative tissue weight. With either method, there is a need for calibration, although this could be achieved for relative tissue weight at least with only a few subsamples.
相对含水量可以通过组织鲜重与组织膨压重的比值来准确估计，这里称为相对组织重量。相对含水量和相对组织重量呈线性相关，这可以通过代数方法证明。在八个不同的采样时间点，对葡萄（Vitis vinifera L. cv. Shiraz）叶片组织进行了 r(2)的平均值计算，结果为 0.993。对于玉米（Zea mays cv. Cornell M-3）（0.998）和苹果（Malus sylvestris cv. Northern Spy）（0.997），使用一系列不同叶龄的叶片也获得了类似的高值。唐尼和米勒（1971 年）提出的假设，即玉米的相对含水量可以通过水分吸收来估计，也对葡萄叶片进行了研究；结果表明，这种方法的估计值不如相对组织重量可靠。对于这两种方法，都需要进行校准，尽管对于相对组织重量，至少可以通过几个亚样本实现校准。
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