|Table of Contents|

THE COUPLE EFFECT OF WATER AND PHOSPHORUS ON PHYSIOBIOCHEMICAL CHARACTERS OF DIFFERENT GENOTYPIC SOYBEAN AT SEEDLING STAGE(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2007年06期
Page:
873-878
Research Field:
Publishing date:

Info

Title:
THE COUPLE EFFECT OF WATER AND PHOSPHORUS ON PHYSIOBIOCHEMICAL CHARACTERS OF DIFFERENT GENOTYPIC SOYBEAN AT SEEDLING STAGE
Author(s):
ZHONG Peng1; WU Jun-jiang1; LIU Li-jun1; LIN Wei-gang1; DONG De-jian1; WANG Jian-li2
1. Soybean Research Institute，Heilongjiang Academy of Agricultural Sciences，Harbin 150086；
2.Institute of Pratacultural Sciences，Heilongjiang Academy of Agricultural Sciences，Harbin,150086
Keywords:
Soybean; Genotype; Water stress; P nutrition
PACS:
S565.1
DOI:
10.3969/j.issn.1000-9841.2007.06.013
Abstract:
Soybean cultivars with high phosphorus efficiency adapt to P stress environment easily.Previous studies have focused on the mechanism of soybean’s adaptation to low P stress.But the coupling effect of water and phosphorus on different P efficiency genotypic soybean is less documented.Therefore，pot experiments were conducted in 2006 year，with P high efficient soybean Heihe 27 and P low efficient soybean Heihe 29 as materials，to determine the influence of water and P coupling on physio-biochemical characters of different genotypic soybean at seedling stage.Two P (applied P and without P) and four water (100%，70%，50% and 30% of the maximum field water holding capability) treatments were designed and endosmosis permeability，root active absorbing area，malondiaidehyde (MDA) content，relative conductivity，Superoxide dismutase (SOD)，peroxide (POD)enzyme activity and leaf water content were determined.Physiological activities were greatly enhanced due to sufficient P and water supply for both cultivars; under P and water stress，Heihe 27 could resist the low phosphorus and drought stress by improving root vigor，SOD and POD activity，reducing endosmosis permeability.While Heihe 29 only had some morphological changes such as increasing root area to adapt to low P and drought stress，which showed it could grow well under sufficient P condition.The result also suggest P high efficient soybean have better drought tolerance by ameliorating water supply status under drought stress.

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Last Update: 2014-10-19