Resistance in sorghum to the shoot fly,Atherigona soccata:epicuticular wax and wetness of the central whorl leaf of young seedlings
作者:
K. F. NWANZE,
R. J. PRING,
P. S. SREE,
D. R. BUTLER,
Y. V. R. REDDY,
P. SOMAN,
期刊:
Annals of Applied Biology
(WILEY Available online 1992)
卷期:
Volume 120,
issue 3
页码: 373-382
ISSN:0003-4746
年代: 1992
DOI:10.1111/j.1744-7348.1992.tb04897.x
出版商: Blackwell Publishing Ltd
关键词: Sorghum;seedlings;shoot fly;leaf surface wetness;epicuticular wax structure;resistance
数据来源: WILEY
摘要:
SummarySorghum genotypes known to be resistant or susceptible to shoot fly,Atherigona soccataRondani were examined by scanning electron microscopy for differences in epicuticular wax structure and wetness of the central leaf whorl. Two major types of wax structures were observed: shoot fly resistant and moderately resistant genotypes were characterised by a smooth amorphous wax layer and sparse wax crystals while susceptible genotypes possessed a dense meshwork of crystalline epicuticular wax. The density of wax crystals decreased from the third leaf to the seventh leaf stage and was related to both seedling age and leaf position. Water droplets on susceptible genotypes with dense wax crystals showed spreading at the edges indicating a tendency to wet easily. In resistant genotypes with less dense wax crystals the droplets remained intact and did not spread.
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