文献类型：期刊文献

英文题名：Genetic variations in root morphology and phosphorus efficiency of Pinus massoniana under heterogeneous and homogeneous low phosphorus conditions

作者：Zhang, Yi[1] Zhou, Zhichun[1] Yang, Qing[1]

第一作者：张莹

通信作者：Zhang, Y[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Fu Yang, Zhejiang, Peoples R China

年份：2013

卷号：364

期号：1-2

起止页码：93-104

外文期刊名：PLANT AND SOIL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000314722800009)】；

基金：We thank the editor and anonymous reviewers for their helpful comments on the earlier version of this manuscript. We thank members of the Forest Breeding Group of the Research Institute of Subtropical Forestry for discussion, encouragement, and assistance in the pot measurements. This research was supported by a research project from the National Natural Science Foundation of China (31070599), the National Key Technology R&D Program in the 12th Five year Plan of China (2012BAD01B02) and the Hi-Tech Research and Development Program ("863" Program) (2011AA100203).

语种：英文

外文关键词：Heterogeneous low-P stress; Homogeneous low-P stress; Genetic variation; P efficiency; Pinus massoniana L.

摘要：The vertical distribution of available phosphorus (P) in the soil is usually heterogeneous with soil depth. However, little is known about the P efficiency of conifer species under vertically heterogeneous low-P conditions. The purpose of this study was to investigate the genetic variations in growth traits and P efficiency of Pinus massoniana, under heterogeneous and homogeneous low-P conditions. Pot experiments consisting of low-P (a low P level in all soil layers), layered-P (a high P level in the topsoil and a low P level in the bottom soil), and high-P (high P levels in all soil layers) conditions were designed and conducted. Three-way ANOVA was used to investigate genetic variations in P efficiency and the major growth traits under these three types of P conditions. There were substantial genetic variations in the major growth traits, including tree height, stem diameter and seedling dry weight, under both heterogeneous and homogeneous low-P conditions. The heritability for major growth traits was high under both types of low-P condition. Moreover, there were significant genotype x P interaction effects for growth parameters. Our results indicate that it may be possible to select Masson pine genotypes with high P efficiency and productivity. The significant genotype x environment interactions should be exploited in breeding, and genotypes showing specific adaptations to certain nutrient environments should be bred and used within that environment.