Desiccation of leaves after de-submergence is one cause for intolerance to complete submergence of the rice cultivar IR 42

被引:37
作者
Setter, Timothy L. [1 ,3 ]
Bhekasut, Panatda [2 ]
Greenway, Hank [3 ]
机构
[1] Dept Agr & Food Western Australia, S Perth, WA 6151, Australia
[2] Dept Agr Thailand, Deep Water Rice Res Stn, Prachin Buri, Thailand
[3] Univ Western Australia, Sch Plant Biol, Fac Nat & Agr Sci, Perth, WA 6009, Australia
关键词
hydraulic conductivity; stomatal conductance; submergence; water potential; FLOODING TOLERANCE; GROWTH; PLANTS; RESPONSES; SEEDLINGS; PRESSURE; ROOTS;
D O I
10.1071/FP10025
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
This paper presents evidence that severe water deficits, following de-submergence after flash flooding of rice, contribute to submergence intolerance of IR 42, a rice cultivar that rapidly elongates during submergence. In glasshouse experiments, 13-day-old rice seedlings were completely submerged for 3-5 days. The main experiments were with IR 42, a cultivar intolerant to transient complete submergence. During submergence the 3rd leaf expanded, and after 5 days submergence its sheath was 4-fold longer than in non-submerged seedlings. After de-submergence, this leaf rapidly desiccated, its water potential dropped below 2 MPa, while the stomatal conductance was very low. Excision experiments showed the water deficits after de-submergence were due mainly to a large reduction in the hydraulic conductivity in the leaf sheath. The water deficits are an important cause in the sequence of events rather than a mere result of injury: when plants were de-submerged at 100% rather than at 50% RH, water potentials remained high. However, when, after another 5 days, these plants were transferred to 50% RH, the 3rd leaf rapidly desiccated, indicating little repair of the lesion causing the low hydraulic conductivity.
引用
收藏
页码:1096 / 1104
页数:9
相关论文
共 32 条
[1]   Flooding stress: Acclimations and genetic diversity [J].
Bailey-Serres, J. ;
Voesenek, L. A. C. J. .
ANNUAL REVIEW OF PLANT BIOLOGY, 2008, 59 :313-339
[3]   LEAF WATER POTENTIALS MEASURED WITH A PRESSURE CHAMBER [J].
BOYER, JS .
PLANT PHYSIOLOGY, 1967, 42 (01) :133-&
[4]  
Bramley H, 2010, WATERLOGGING SIGNALLING AND TOLERANCE IN PLANTS, P151, DOI 10.1007/978-3-642-10305-6_8
[5]   The contrasting influence of short-term hypoxia on the hydraulic properties of cells and roots of wheat and lupin [J].
Bramley, Helen ;
Turner, Neil C. ;
Turner, David W. ;
Tyerman, Stephen D. .
FUNCTIONAL PLANT BIOLOGY, 2010, 37 (03) :183-193
[6]  
Catsky J., 1960, BIOL PLANTARUM, V2, P76
[7]   Oxygen dynamics in submerged rice (Oryza sativa) [J].
Colmer, T. D. ;
Pedersen, O. .
NEW PHYTOLOGIST, 2008, 178 (02) :326-334
[8]   Flooding tolerance: suites of plant traits in variable environments [J].
Colmer, T. D. ;
Voesenek, L. A. C. J. .
FUNCTIONAL PLANT BIOLOGY, 2009, 36 (08) :665-681
[9]   Elongation ability and non-structural carbohydrate levels in relation to submergence tolerance in rice [J].
Das, KK ;
Sarkar, RK ;
Ismail, AM .
PLANT SCIENCE, 2005, 168 (01) :131-136
[10]   Submergence tolerance in relation to variable floodwater conditions in rice [J].
Das, Krishna Kaveri ;
Panda, D. ;
Sarkar, R. K. ;
Reddy, J. N. ;
Ismail, Abdelbagi M. .
ENVIRONMENTAL AND EXPERIMENTAL BOTANY, 2009, 66 (03) :425-434