MODIFICATION OF PHOSPHOLIPID CATABOLISM IN MICROSOMAL-MEMBRANES OF GAMMA-IRRADIATED CAULIFLOWER (BRASSICA-OLERACEA L)

被引:34
作者
VOISINE, R
VEZINA, LP
WILLEMOT, C
机构
[1] UNIV LAVAL,DEPT FOOD SCI & TECHNOL,QUEBEC CITY G1K 7P4,QUEBEC,CANADA
[2] AGR CANADA,CTR FOOD RES & DEV,ST HYACINTHE J2S 8E3,PQ,CANADA
[3] AGR CANADA,RES STN,QUEBEC CITY G1V 2J3,PQ,CANADA
关键词
D O I
10.1104/pp.102.1.213
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Acceleration of membrane deterioration has been observed recently during storage of gamma-irradiated cauliflower (Brassica oleracea L., Botrytis group). In the present study, the activity of microsome-associated lipolytic enzymes was investigated in cauliflower florets exposed to 0 or 4 kilograys of gamma radiation and stored for 8 d at 13-degrees-C. Radiolabeled breakdown products obtained from the metabolism of (16:0/18:2*)-phosphatidylcholine and (16:0/16:0)-phos-phatidyl-[N-methyl-H-3]choline by microsomal membranes indicated that phospholipase D (EC 3.1.4.4), phosphatidic acid phosphatase (EC 3.1.3.4), and lipolytic acyl hydrolase were associated with the membranes. The rate of phosphatidylcholine catabolism by the membranes increased slowly in control cauliflower during storage. Gamma irradiation caused an immediate rise in phosphatidylcholine catabolism that remained higher than that of the controls during subsequent storage. Collectively, the data suggest that enhancement of membrane lipolytic activity results from free-radical-induced stress. Rapid increase of the membrane-associated phospholipase D activity may be a key event leading to accelerated membrane deterioration following gamma irradiation.
引用
收藏
页码:213 / 218
页数:6
相关论文
共 24 条
[1]  
BLEE E, 1990, J BIOL CHEM, V265, P12887
[2]  
BLIGH EG, 1959, CAN J BIOCHEM PHYS, V37, P911
[3]  
BLIGNY R, 1989, J BIOL CHEM, V264, P4888
[4]   MICROVISCOSITY OF PLASMALEMMAS IN ROSE PETALS AS AFFECTED BY AGE AND ENVIRONMENTAL-FACTORS [J].
BOROCHOV, A ;
HALEVY, AH ;
BOROCHOV, H ;
SHINITZKY, M .
PLANT PHYSIOLOGY, 1978, 61 (05) :812-815
[5]   SENESCENCE AND THE FLUIDITY OF ROSE PETAL MEMBRANES - RELATIONSHIP TO PHOSPHOLIPID-METABOLISM [J].
BOROCHOV, A ;
HALEVY, AH ;
SHINITZKY, M .
PLANT PHYSIOLOGY, 1982, 69 (02) :296-299
[6]  
BRADFORD MM, 1976, ANAL BIOCHEM, V72, P248, DOI 10.1016/0003-2697(76)90527-3
[7]   DISTINGUISHABLE PATTERNS OF PHOSPHOLIPID SUSCEPTIBILITY TO CATABOLISM IN SENESCING CARNATION PETALS [J].
BROWN, JH ;
CHAMBERS, JA ;
THOMPSON, JE .
PHYTOCHEMISTRY, 1991, 30 (08) :2537-2543
[8]   INFLUENCE OF ACYL CHAIN COMPOSITION ON THE DEGRADATION OF PHOSPHATIDYLCHOLINE BY PHOSPHOLIPASE-D IN CARNATION MICROSOMAL-MEMBRANES [J].
BROWN, JH ;
PALIYATH, G ;
THOMPSON, JE .
JOURNAL OF EXPERIMENTAL BOTANY, 1990, 41 (229) :979-986
[9]  
Deschene A., 1991, Postharvest Biology and Technology, V1, P19, DOI 10.1016/0925-5214(91)90016-5
[10]   MEMBRANE DETERIORATION IN SENESCING CARNATION FLOWERS - COORDINATED EFFECTS OF PHOSPHOLIPID DEGRADATION AND THE ACTION OF MEMBRANOUS LIPOXYGENASE [J].
FOBEL, M ;
LYNCH, DV ;
THOMPSON, JE .
PLANT PHYSIOLOGY, 1987, 85 (01) :204-211