The barrier to radial oxygen loss from roots of rice (Oryza sativa L.) is induced by growth in stagnant solution

被引:184
作者
Colmer, TD [1 ]
Gibberd, MR
Wiengweera, A
Tinh, TK
机构
[1] Univ Western Australia, Fac Agr, Nedlands, WA 6907, Australia
[2] Prachinburi Rice Res Ctr, Prachin Buri 251150, Thailand
[3] Cantho Univ, Can Tho, Vietnam
关键词
Aerenchyma; radial O-2 loss; rice; roots; waterlogging;
D O I
10.1093/jexbot/49.325.1431
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The present report describes experiments in which the effects of growth in aerated and stagnant nutrient solutions on adventitious root porosities and patterns of radial O-2 loss (ROL) from the roots of four genotypes of rice (Oryza sativa L.) were evaluated. The genotypes studied are usually cultivated in farming systems which differ markedly in their degree of soil waterlogging and flooding. Rice genotypes were found to differ in the constitutive porosity (% gas space) of their adventitious roots when grown in aerated solutions (lowest was 16%, highest was 30%), and the roots grown in stagnant conditions had porosities between 28% and 38%. ROL from the adventitious roots raised in aerated solution increased with distance behind the tip in three of the four genotypes; whereas for roots raised in stagnant solution, ROL decreased with distance behind the tip which is indicative of a high resistance to diffusion between the aerenchyma and external medium. For example, at 35 mm behind the root tip the ROL from roots of the 'deepwater' cultivar grown in stagnant conditions was 0.7% of the rate of its aerated roots, for the 'lowland' cultivar it was 5.6%, and for one of the 'upland' cultivars it was 43.6%. Thus, the barrier to ROL from the adventitious roots in three of the four genotypes was induced by growth in stagnant nutrient solution. A low rate of ROL from the basal zones of roots in an O-2-free environment is of adaptative value since longitudinal diffusion of O-2 to the root apex would be enhanced which, in turn, enables greater penetration of roots into anaerobic soils.
引用
收藏
页码:1431 / 1436
页数:6
相关论文
共 30 条
[1]   PHRAGMITES-AUSTRALIS - A PRELIMINARY-STUDY OF SOIL-OXIDIZING SITES AND INTERNAL GAS-TRANSPORT PATHWAYS [J].
ARMSTRONG, J ;
ARMSTRONG, W .
NEW PHYTOLOGIST, 1988, 108 (04) :373-382
[3]   RADIAL OXYGEN LOSS FROM ROOTS - THEORETICAL BASIS FOR MANIPULATION OF FLUX DATA OBTAINED BY CYLINDRICAL PLATINUM-ELECTRODE TECHNIQUE [J].
ARMSTRONG, W ;
WRIGHT, EJ .
PHYSIOLOGIA PLANTARUM, 1975, 35 (01) :21-26
[4]  
Armstrong W., 1979, Advances in Botanical Research, V7, P225, DOI 10.1016/S0065-2296(08)60089-0
[5]   POLAROGRAPHIC OXYGEN ELECTRODES AND THEIR USE IN PLANT AERATION STUDIES [J].
ARMSTRONG, W .
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION B-BIOLOGICAL SCIENCES, 1994, 102 :511-527
[6]   Flooding: The survival strategies of plants [J].
Blom, CWPM ;
Voesenek, LACJ .
TRENDS IN ECOLOGY & EVOLUTION, 1996, 11 (07) :290-295
[7]   ADAPTATIONS TO FLOODING IN PLANTS FROM RIVER AREAS [J].
BLOM, CWPM ;
BOGEMANN, GM ;
LAAN, P ;
VANDERSMAN, AJM ;
VANDESTEEG, HM ;
VOESENEK, LACJ .
AQUATIC BOTANY, 1990, 38 (01) :29-47
[8]   PHYSIOLOGICAL ECOLOGY OF RIVERSIDE SPECIES - ADAPTIVE RESPONSES OF PLANTS TO SUBMERGENCE [J].
BLOM, CWPM ;
VOESENEK, LACJ ;
BANGA, M ;
ENGELAAR, WMHG ;
RIJNDERS, JHGM ;
VANDESTEEG, HM ;
VISSER, EJW .
ANNALS OF BOTANY, 1994, 74 (03) :253-263
[9]   OBSERVATIONS ON THE ROOT ANATOMY OF RICE (ORYZA-SATIVA-L) [J].
CLARK, LH ;
HARRIS, WH .
AMERICAN JOURNAL OF BOTANY, 1981, 68 (02) :154-161
[10]   A comparison of NH4+ and NO3- net fluxes along roots of rice and maize [J].
Colmer, TD ;
Bloom, AJ .
PLANT CELL AND ENVIRONMENT, 1998, 21 (02) :240-246