Possible Involvement of Altered Gibberellin Metabolism in the Induction of Tomato Irregular Ripening in Dwarf Cherry Tomato by Silverleaf Whitefly

被引：0

作者：

S. Hanif-Khan

R. C. Bullock

P. J. Stoffella

C. A. Powell

J. K. Brecht

H. J. McAuslane

R. K. Yokomi

机构：

[1] Indian River Research and Education Center,

[2] IFAS,undefined

[3] University of Florida,undefined

[4] Fort Pierce,undefined

[5] FL 34945-3138,undefined

[6] Horticultural Sciences Department,undefined

[7] IFAS,undefined

[8] University of Florida,undefined

[9] Gainesville,undefined

[10] FL 32611-0630,undefined

[11] Entomology and Nematology Department,undefined

[12] IFAS,undefined

[13] University of Florida,undefined

[14] Gainesville,undefined

[15] FL 32611-0630,undefined

[16] USDA-Agricultural Research Station,undefined

[17] Orlando,undefined

[18] FL 32803,undefined

[19] USA,undefined

来源：

Journal of Plant Growth Regulation | 1997年 / 16卷

关键词：

Key Words. Cherry tomato—Gibberellic acid—Cycocel—Silverleaf whitefly—Tomato irregular ripening;

D O I：

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学科分类号：

摘要：

External and internal tomato irregular ripening (TIR) symptoms were associated with the feeding of silverleaf whitefly (SLW), Bemisia argentifolii Bellows and Perring. Four experiments consisting of various soil drench applications of GA3 (100 ppm) and cycocel (CCC, an inhibitor of GA biosynthesis; 1,000 and 2,000 ppm) were applied to dwarf cherry tomato cv. Florida Petite in the presence and absence of SLW in an attempt to mimic the disorders induced by the SLW. The application of GA3 induced external and internal TIR symptoms similar to the SLW-induced disorder. Minimal TIR-like symptoms also occurred in the control and CCC treatments. Internal TIR symptoms in GA3, GA3 plus SLW, and GA3 plus CCC treatments ranged from 66% to 97% throughout the experiments. The incidence of external TIR symptoms was highest in the GA3 plus SLW treatment compared with the other treatments. CCC reduced the incidence of external TIR symptoms induced by GA3 or GA3 plus SLW treatments. However, CCC-treated plants also attracted more oviposition and higher populations of SLW and consequently induced a greater incidence of TIR symptoms than SLW treatment alone. Furthermore, although low SLW populations may be associated with low external TIR symptoms, internal TIR symptoms almost always remained high in infested plants. The results suggest that the TIR disorder in dwarf cherry tomato which is induced by the SLW may be a gibberellin-regulated disorder.

引用

页码：245 / 251

页数：6