Bug damage in New Zealand wheat grain: The role of various heteropterous insects
作者:
D. Every,
J.A. Farrell,
M.W. Stufkens,
期刊:
New Zealand Journal of Crop and Horticultural Science
(Taylor Available online 1992)
卷期:
Volume 20,
issue 3
页码: 305-312
ISSN:0114-0671
年代: 1992
DOI:10.1080/01140671.1992.10421772
出版商: Taylor & Francis Group
关键词: wheat;bug damage;heteropterous insects;Nysius huttoni;Rhypodessp.;Stenotus binotatus;Calocoris norvegicus;Sidnia kinbergi;Dictyotus caenosus;insect caging;visible damage;electrophoresis;proteolysis;protease;gluten proteins;amylase;starch;bread
数据来源: Taylor
摘要:
Certain heteropterousinsects (true bugs) in New Zealand deposit salivary enzymes into immature wheat grain while feeding. These enzymes survive in harvested wheat, destroy gluten structure in dough, and cause poor quality bread. This study investigates what insect is responsible for bug-damaged wheat The following field-collected insect species were caged on wheat at the watery ripe growth stage:Nysius huttoni, Rhypodessp.,Stenotus binotatus, Calocoris norvegicus, Sidnia kinbergi, andDictyotus caenosus. All the insects produced visible signs of damage on kernels and reduced kernel weight, but only wheat damaged byN. huttoniandS. binotatushad sufficiently high levels of pH 9 active, gluten-degrading enzyme to cause poor quality bread. However, the electrophoretic patterns of protein subunits from degraded glutenand the characteristics of bug damage in bread were different for these two insects. Also, the appearances of the damaged kernels and levels of α-amylase were clearly different in the two samples. Only wheat damaged byN. huttonishowed all the characteristics of naturally bug-damaged wheat harvested and tested in New Zealand during the last decade.
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