Broadley Martin R, Bowen Helen C, Cotterill Helen L, Hammond John P, Meacham Mark C, Mead Andrew, White Philip J
Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK.
J Exp Bot. 2003 May;54(386):1431-46. doi: 10.1093/jxb/erg143.
This study describes the variation in the mean relative shoot Ca content within the angiosperms at the ordinal level. Data were derived from studies in the literature in which the shoot Ca content of two or more species had been compared, and from a hydroponic experiment in which plants were selected to represent the relative number of species within each angiosperm order. Across all angiosperms, most of the variation in shoot Ca content occurred at and above the level of the order. Relative shoot Ca contents and variances correlated between literature and experimental data. In general, orders of commelinoid monocots had lower Ca contents than other monocot or eudicot orders. These results are used to illustrate how physiological and ecological hypotheses can be formulated using literature data.
本研究描述了被子植物在目级水平上平均相对茎钙含量的变化。数据来源于文献研究（其中比较了两个或更多物种的茎钙含量）以及一项水培实验（该实验中选择植物以代表每个被子植物目内物种的相对数量）。在所有被子植物中，茎钙含量的大部分变化发生在目及目以上水平。文献数据和实验数据中的相对茎钙含量及方差具有相关性。总体而言，鸭跖草类单子叶植物目的钙含量低于其他单子叶植物目或双子叶植物目。这些结果用于说明如何利用文献数据来构建生理和生态假设。
