[1]马启林,雷慰慈,山口武视,等.过湿条件下大豆不定根的发生及其生理作用研究[J].大豆科学,2008,27(01):79-85.[doi:10.11861/j.issn.1000-9841.2008.01.0079]
　MA Qi-lin,LEI Wei-ci,Takeshi YAMAGUCHI,et al.Incidence and Physiological Effects of Soybean Adventitious Root under Excessive Soil Water[J].Soybean Science,2008,27(01):79-85.[doi:10.11861/j.issn.1000-9841.2008.01.0079]
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过湿条件下大豆不定根的发生及其生理作用研究

《大豆科学》[ISSN:1000-9841/CN:23-1227/S] 卷: 第27卷 期数: 2008年01期 页码: 79-85 栏目: 出版日期: 2008-02-25
Title:
Incidence and Physiological Effects of Soybean Adventitious Root under Excessive Soil Water
作者:
马启林1; 2; 雷慰慈3; 山口武视2; 中田升2; 李阳生1
1 武汉大学生命科学学院，湖北武汉 430072；
2 鸟取大学农学部，日本鸟取 680-8553；
3 长江大学农学院，湖北荆州 434103
Author(s):
MA Qi-lin1; 2; LEI Wei-ci3; Takeshi YAMAGUCHI2; Noboru NAKATA2; and LI Yang-sheng1
1 College of Life Science，Wuhan University，Wuhan 430072，Hubei，China；
2 Faculty of Agriculture，Tottori University，Tottori 680-8553，Japan；
3 Faculty of Agriculture，Yangtze University，Jingzhou 434103，Hubei，China
关键词:
大豆; 涝渍逆境; 不定根; 氮的同化吸收; 伤流速度
Keywords:
Soybean [Glycine max（L.) Merr.]; Flooding; Adventitious root; Nitrogen uptake and assimilation; Xylem bleeding rate
DOI:
10.11861/j.issn.1000-9841.2008.01.0079
文献标志码:
A
摘要:
大豆是实行水旱轮作的重要作物之一，在缺乏良好排水条件的水田中实行水旱轮作时，长期涝渍所致的伤害成为大豆生长不良及产量低的重要原因。通过盆栽和大田试验在大豆生育初期进行过湿处理，调查培土或无培土条件下不定根的发生情况，揭示不定根对伤流速度，氮素的吸收运转等的影响，讨论了不定根与大豆耐湿性的关系。淹水条件下培土对不定根及根瘤的发生产生较大的影响，淹水条件下发生的不定根的量占总根重的43.1%，这些不定根提供了81.4%的伤流速度。不定根的呼吸速度为2.61 mg CO2g-1h-1，是初生根的近3倍。淹水导致全叶位叶片的叶色变淡，不定根的发生改变了伤流液中不同形态氮素的组成和全氮含量，可使下位叶的叶色维持较高水平。淹水条件下大豆的冠根比比对照小。不定根取代了受涝渍伤害而失去功能的初生根的作用，积极地进行养分和水的吸收，确保了涝渍逆境下物质生产的顺利进行。
Abstract:
Excessive soil water is often a serious problem in Jianghan Plain，which is a major marketable grain production base in Hubei Province，with continuous rainfall and poorly drained upland field which converted from paddy.As an important pioneer crop planted in the upland field converted from paddy，injury of excessive soil water become the main problem of low productivity of soybean.Waterlogged conditions were conducted at the early growth stage of soybean in pilot pot and in field experiments to survey the status of the incidence of adventitious roots under the conditions of ridging or no ridging，and to reveal the effect of adventitious root on xylem bleeding rate，nitrogen uptake and translocation in xylem bleeding sap and moisture resistance.Ridging had a greater influence on the incidence of adventitious root and root nodules than seedling age under the condition of flooding.The volume of adventitious root induced by flooding and ridging accounted for 43.1% of the total root weight，and accounted for 81.4% of bleeding rate.Respiration rate of adventitious root was 2.61 mg CO2g-1h-1，which was three times of the primary roots.Flooding treatment brought the SPAD of all the leaves in a plant down significantly，but adventitious root could revise the existent forms of nitrogen and total nitrogen content in xylem bleeding sap，and maintain the color of lower leaf on a higher level.The ratio of shoot to root under the condition of flooding was smaller than that of control.Therefore，as an adaptation character of soybean plants to excessive soil water，adventitious root was induced in a large number and replaced the function of primary root to assure dry matter production，thereby enhancing the flooding resistance of soybean plants.

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备注/Memo

基金项目：湖北省重大科技发展计划项目（962P0503）

作者简介：马启林（1969-），男，博士，主要从事作物生理和作物品质改良研究。E-mail：qilinma@hotmail.com

更新日期/Last Update: 2014-10-09