METABOLIC RESPONSE OF MEDICAGO-SATIVA L AND LOTUS-CORNICULATUS L ROOTS TO ANOXIA

被引:14
作者
BARTA, AL [1 ]
机构
[1] OHIO STATE UNIV, OHIO AGR RES & DEV CTR, DEPT AGRON, WOOSTER, OH 44691 USA
关键词
D O I
10.1111/j.1365-3040.1986.tb01575.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Differential rates of fermentation and energy production have been implicated in the response of plant species to extended root anoxia. This study describes the metabolic response to anaerobiosis of waterlogging-tolerant birdsfoot trefoil (Lotus corniculatus L.) and waterlogging-sensitive alfalfa (Medicago sativa L.). Studies were carried out on glasshouse-grown plants subjected to root anaerobiosis in nutrient solution. Rate of fermentation, as estimated by CO2 evolution, declined significantly upon anaerobiosis in both species but was proportionally less, relative to the aerobic control, in trefoil. Another indicator of carbon flux through glycolysis, the concentration of glucose-6-phosphate, was also significantly lower in trefoil roots relative to aerobic controls. Both species showed significantly increased root exudation of K+, sugars and amino-N, especially during the first 2 d of root anaerobiosis, indicating changes in membrane selective permeability. The energy status of roots subjected to anaerobiosis declined sharply in both species but trefoil roots maintained higher ATP/ADP ratios for up to 4 d of anaerobiosis. The results are consistent with the hypothesis that increased fermentation activity maintains a more favourable root energy status. This higher energy status may facilitate survival by maintaining crucial root activities, such as maintenance of membrane stability.
引用
收藏
页码:127 / 131
页数:5
相关论文
共 25 条
[1]   EFFECTS OF REDUCED SUPPLY OF OXYGEN ON THE METABOLISM OF ROOTS OF GLYCERIA-MAXIMA AND PISUM-SATIVUM [J].
APREES, T ;
WILSON, PM .
ZEITSCHRIFT FUR PFLANZENPHYSIOLOGIE, 1984, 114 (05) :493-503
[2]   TEMPERATURE AND ANOXIC INJURY IN PEA-SEEDLINGS [J].
BARCLAY, AM ;
CRAWFORD, RMM .
JOURNAL OF EXPERIMENTAL BOTANY, 1981, 32 (130) :943-949
[3]  
BARTA AL, 1984, PLANT CELL ENVIRON, V7, P187, DOI 10.1111/j.1365-3040.1984.tb01666.x
[4]   ANALYSIS OF THE FREE NUCLEOTIDE POOLS OF MAMMALIAN-TISSUES BY HIGH-PRESSURE LIQUID-CHROMATOGRAPHY [J].
BROWN, EG ;
NEWTON, RP ;
SHAW, NM .
ANALYTICAL BIOCHEMISTRY, 1982, 123 (02) :378-388
[5]  
CARPENTER JR, 1980, J AM SOC HORTIC SCI, V105, P684
[6]  
CARPENTER JR, 1980, J AM SOC HORTIC SCI, V105, P688
[7]  
Chirkova T.V., 1978, Plant Life in Anaerobic Environments, P137
[8]   ALCOHOL DEHYDROGENASE ACTIVITY IN RELATION TO FLOODING TOLERANCE IN ROOTS [J].
CRAWFORD, RM .
JOURNAL OF EXPERIMENTAL BOTANY, 1967, 18 (56) :458-&
[9]   CHANGES IN THE ABILITY OF PLANTS TO ALTER THE PH OF THE FLOODING MEDIUM AS AN EARLY SYMPTOM OF FLOODING STRESS IN HELIANTHUS-ANNUUS [J].
DRAKEFORD, DR ;
REID, DM .
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 1984, 62 (11) :2417-2422
[10]   ROLE OF ATP IN NITRITE REDUCTION IN ROOTS OF WHEAT AND PEA [J].
DRY, I ;
WALLACE, W ;
NICHOLAS, DJD .
PLANTA, 1981, 152 (03) :234-238