Biomass production, transpiration rate and endogenous abscisic acid levels in grafts of flacca and wild-type tomato (Lycopersicon esculentum)

被引:22
作者
Chen, GX
Lips, SH
Sagi, M
机构
[1] Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Biostress Res Lab, IL-84990 Sede Boqer, Israel
[2] Ben Gurion Univ Negev, Inst Appl Res, IL-84105 Beer Sheva, Israel
关键词
ABA concentration; rootstock; scion; tomato graft; vegetative growth;
D O I
10.1071/PP01263
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
ABA is a plant signalling-molecule that plays a key role in regulating stomatal response, stress-tolerance responses, and coordinated growth of roots and shoots. Knowledge of the relationship between endogenous ABA level and plant growth is essential for improving plant growth and productivity. The wild-type tomato Rheinlands Ruhm (RR) and its flacca mutant were grafted in order to determine the relationship between endogenous ABA levels and biomass production. The flacca genotype is an ABA-deficient mutant, characterized by high stomatal conductance during the day or the night, high transpiration rate, marked tendency to wilt, and smaller size. Flacca scions grafted on to wild-type rootstock (Fs/Wr) exhibited higher ABA levels, lower transpiration rate, and higher water content than those of a control graft of flacca scion on flacca rootstock (Fs/Fr). Fs/Wr exhibited a lower ABA concentration, xylem exudate rate, ABA xylem-loading rate, and dry weight biomass in wild-type rootstock than in control grafts of wild-type scion on wild-type rootstock (Ws/Wr). Flacca rootstock grafted to wild-type scion (Ws/Fr) showed a higher ABA level, xylem exudation rate, ABA xylem-loading rate, dry weight biomass and length than grafts to flacca scion (Fs/Fr). Ws/Fr did not induce significant changes in wild-type scion as compared with Ws/Wr. In double grafts, flacca shoot fresh weight was significantly increased in flacca scion and wild-type scion grafted on to flacca rootstock (Fs + Ws/ Fr) or wild-type rootstock (Fs + Ws/ Wr). There was a significant linear relationship between biomass and ABA in scions (r= 0.997, P= 0.001). These results support the notion that ABA increases growth of tomato seedlings via improved stomatal control.
引用
收藏
页码:1329 / 1335
页数:7
相关论文
共 25 条
[1]  
BAPTISTE MJ, 1998, PLANT MOL BIOL, V38, P1089
[2]   PHENOTYPIC-EXPRESSION OF WILD-TYPE TOMATO AND 3 WILTY MUTANTS IN RELATION TO ABSCISIC-ACID ACCUMULATION IN ROOTS AND LEAFLETS OF RECIPROCAL GRAFTS [J].
CORNISH, K ;
ZEEVAART, JAD .
PLANT PHYSIOLOGY, 1988, 87 (01) :190-194
[3]  
FEMBRINI M, 1995, J EXPT BOT, V46, P525
[4]   Characterization and expression of plasma and tonoplast membrane aquaporins in primed seed of Brassica napus during germination under stress conditions [J].
Gao, YP ;
Young, L ;
Bonham-Smith, P ;
Gusta, LV .
PLANT MOLECULAR BIOLOGY, 1999, 40 (04) :635-644
[5]  
HEWITT EJ, 1966, 22 COMM AGR BUR COMM
[6]   PHENOTYPIC REVERSION OF FLACCA, A WILTY MUTANT OF TOMATO, BY ABSCISC ACID [J].
IMBER, D ;
TAL, M .
SCIENCE, 1970, 169 (3945) :592-&
[7]   GROWTH AND WATER RELATIONS OF WILTY MUTANTS OF TOMATO (LYCOPERSICON-ESCULENTUM MILL) [J].
JONES, HG ;
SHARP, CS ;
HIGGS, KH .
JOURNAL OF EXPERIMENTAL BOTANY, 1987, 38 (196) :1848-1856
[8]   Regulation of the Arabidopsis thaliana aquaporin gene AthH2 (PIP1b) [J].
Kaldenhoff, R ;
Kolling, A ;
Richter, G .
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY, 1996, 36 (03) :351-354
[9]   Abscisic acid signal transduction [J].
Leung, J ;
Giraudat, J .
ANNUAL REVIEW OF PLANT PHYSIOLOGY AND PLANT MOLECULAR BIOLOGY, 1998, 49 :199-222
[10]   SEASONAL AND DIURNAL CHANGES IN ABSCISIC-ACID AND WATER RELATIONS OF APRICOT LEAVES (PRUNUS-ARMENIACA L) [J].
LOVEYS, BR ;
ROBINSON, SP ;
DOWNTON, WJS .
NEW PHYTOLOGIST, 1987, 107 (01) :15-27