Monclus Romain, Dreyer Erwin, Delmotte Francis M, Villar Marc, Delay Didier, Boudouresque Eric, Petit Jean-Michel, Marron Nicolas, Bréchet Claude, Brignolas Franck
Laboratoire de Biologie des Ligneux et des Grandes Cultures, UPRES EA 1207, UFR-Faculté des Sciences, Université d'Orléans, rue de Chartres, BP 6759, 45067 Orléans Cedex 02, France.
New Phytol. 2005 Jul;167(1):53-62. doi: 10.1111/j.1469-8137.2005.01407.x.
Here we tested whether some leaf traits could be used as predictors for productivity in a range of Populus deltoides x P. nigra clones. These traits were assessed in 3-yr-old rooted cuttings from 29 clones growing in an open field trial, in a five randomized complete block design, under optimal irrigation. Variables were assigned to four groups describing productivity (above-ground biomass, total leaf area), leaf growth (total number of leaves increment rate), leaf structure (area of the largest leaf, specific leaf area, carbon and nitrogen contents), and carbon isotope discrimination in the leaves (Delta). High-yielding clones displayed larger total leaf area and individual leaf area, while no correlation could be detected between productivity and either leaf structure or Delta. By contrast, Delta was negatively correlated with number of leaves increment rate and leaf N content. Our study shows that there is a potential to improve water-use efficiency in poplar without necessarily reducing the overall productivity.
在此，我们测试了一些叶片性状是否可作为一系列美洲黑杨与欧洲黑杨杂交无性系生产力的预测指标。这些性状在一项露天试验中，对29个无性系3年生的扦插苗进行了评估，试验采用五重复随机完全区组设计，且灌溉条件最优。变量被分为四组，分别描述生产力（地上生物量、总叶面积）、叶片生长（叶片总数增加速率）、叶片结构（最大叶片面积、比叶面积、碳和氮含量）以及叶片中的碳同位素判别值（δ）。高产无性系表现出更大的总叶面积和单叶面积，而生产力与叶片结构或δ之间均未检测到相关性。相比之下，δ与叶片数量增加速率和叶片氮含量呈负相关。我们的研究表明，在不一定降低总体生产力的情况下，提高杨树水分利用效率具有潜力。
