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Incidence and Physiological Effects of Soybean Adventitious Root under Excessive Soil Water(PDF)

《大豆科学》[ISSN:1000-9841/CN:23-1227/S]

Issue:
2008年01期
Page:
79-85
Research Field:
Publishing date:

Info

Title:
Incidence and Physiological Effects of Soybean Adventitious Root under Excessive Soil Water
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
Keywords:
Soybean [Glycine max（L.) Merr.]; Flooding; Adventitious root; Nitrogen uptake and assimilation; Xylem bleeding rate
PACS:
-
DOI:
10.11861/j.issn.1000-9841.2008.01.0079
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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Last Update: 2014-10-09