WHY ARE THE EFFECTS OF ABSCISIC-ACID ON PHOTOSYNTHATE UNLOADING SO VARIABLE - A POSSIBLE ANSWER FROM A SOURCE-LIMITED EXPERIMENTAL SYSTEM

被引：6

作者：

CLIFFORD, PE

ROSS, GS

MCWHA, JA

机构：

[1] QUEENS UNIV BELFAST,DEPT BIOL,BELFAST BT7 1NN,ANTRIM,NORTH IRELAND

[2] QUEENS UNIV BELFAST,DEPT AGR BOT,BELFAST BT9 5PX,ANTRIM,NORTH IRELAND

来源：

JOURNAL OF PLANT PHYSIOLOGY | 1990年 / 137卷 / 02期

关键词：

PHASEOLUS VULGARIS; ABSCISIC ACID; PHOTOSYNTHATE UNLOADING; SEED PHYSIOLOGY;

D O I：

10.1016/S0176-1617(11)80072-6

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The hypothesis that defoliation might lower seed ABA levels with related changes in the effects of exogenous ABA on photosynthate unloading within seeds was tested. Defoliation of dwarf bean (Phaseolus vulgaris L. cv. Masterpiece) plants markedly reduced ABA concentrations in seeds although reduction occurred in embryos rather than testas. Results from three experiments examining the effects of ABA on C-14-photosynthate unloading from excised testas were variable but showed that the promotory effect of ABA was diminished as a result of defoliation pretreatment. The data are consistent with the viewpoint that the variability commonly seen in experiments investigating ABA involvement in photosynthate unloading is caused by fluctuating endogenous ABA levels due, in turn, to the growing conditions of experimental plants.

引用

页码：151 / 154

页数：4

共 19 条

[1]

BRENNER ML, 1982, PLANT GROWTH SUBSTAN, P343

[2] INJECTION OF GROWTH-REGULATORS INTO SEEDS GROWING INSITU ON PLANTS OF PHASEOLUS-VULGARIS WITH A DOUBLE-FRUIT SINK SYSTEM [J].