Science. 1977 Dec 23;198(4323):1209-15. doi: 10.1126/science.198.4323.1209.
The variations of the D/H and (18)O/(16)O ratios of nonexchangeable hydrogen and oxygen in plant cellulose reveal systematic differences between terrestrial plant groups. The slope of deltaD versus delta(18)O of cellulose from a variety of aquatic plants is close to 8 (the meteoric water value), while the slope for a number of terrestrial species is greater than or equal to about 24. Two models involving incorporation of CO(2) and H(2)O into cellulose precursors are proposed to account for these differences. Effects of evaporative transpiration on the isotopic composition of water in leaves are measured and discussed in the context of these models.
植物纤维素中不可交换氢和氧的 D/H 和 (18)O/(16)O 比值的变化揭示了陆地植物群之间存在系统差异。来自多种水生植物的纤维素的 δD 与 δ(18)O 的斜率接近 8（大气水值），而许多陆生物种的斜率大于或等于约 24。提出了两个涉及将 CO(2)和 H(2)O 掺入纤维素前体的模型，以解释这些差异。在这些模型的背景下，测量并讨论了蒸发蒸腾作用对叶片中水同位素组成的影响。
