Seminal, adventitious and lateral root growth and physiological responses in rice to upland conditions

• Published in: Journal of Zhejiang University. A. Science Vol. 4; no. 4; pp. 469 - 473
• Main Author: 杨玲 郑炳松 毛传澡 易可可 吴运荣 吴平 陶勤南
• Format: Journal Article
• Language: English
• Published: China Springer Nature B.V 01.07.2003
• Subjects: Adaptation, Physiological - physiology; Altitude; China; Elongation; Environment; Lateral stability; Membranes; Organic compounds; Oryza - cytology; Oryza - growth & development; Oryza - metabolism; Physiological responses; Physiology; Plant Roots - classification; Plant Roots - cytology; Plant Roots - growth & development; Rice; Roots; Tips; Water - metabolism; 不定根; 生理反应; 生长发育; 种子根; China
• ISSN: 1009-3095; 1673-565X; 1862-1775
• DOI: 10.1631/jzus.2003.0469

Understanding the growth and physiological responses of rice to upland conditions would be help-ful for designing treatments to improve the tolerance of rice under a rainfed system. The objective of this studywas to investigate the initiation, elongation and membrane stability of seminal, lateral and adventitious roots of upland rice after 9-d upland condition treatment. Compared with control roots under waterlogged conditions,upland water deficiency conditions favor seminal and lateral root growth over adventitious root growth by accel-erating seminal root elongation, promoting lateral root initiation and elongation, and reducing the elongation and number of adventitious roots. Enhanced total root number and length resulted in increase of total root dryweight and thereby increasing the mot-to-shoot ratio. Organic compound leakage from seminal root tips and ad-ventitious roots increased progressively to some extent with upland culture duration, while significant increasesin seminal root tips were the consequence of loss of membrane integrity caused by the upland-condition en-haneed growth.