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Journal of Plant Growth Regulation
Huberman, M., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
Riov, J., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
Aloni, B., Department of Vegetable Crops, Volcani Ctr. Agric. Res. Org., Bet-Dagan, Israel
Goren, R., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
High temperatures induced abscission of pepper (Capsicum annuum L. cv. Maor) reproductive organs at various developmental stages. The role of ethylene biosynthesis and auxin economy in high temperature-induced abscission is described. High temperatures somewhat increased ethylene production in the reproductive organs, but the highest temperature treatment, which was the most active in inducing reproductive organ abscission, decreased it. In contrast to ethylene, 1-aminocyclopropane-1-carboxylic acid levels increased significantly in response to high temperatures and correlated positively with the increase in temperature. High temperatures reduced indole-3-acetic acid levels and particularly auxin transport capacity in the reproductive organs. The data suggest that the reduction of auxin transport capacity is the major mechanism by which high temperatures induce reproductive organ abscission in pepper.
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Role of ethylene biosynthesis and auxin content and transport in high temperature-induced abscission of pepper reproductive organs
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Huberman, M., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
Riov, J., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
Aloni, B., Department of Vegetable Crops, Volcani Ctr. Agric. Res. Org., Bet-Dagan, Israel
Goren, R., Kennedy-Leigh Ctr. for Hort. Res., Hebrew University of Jerusalem, Faculty of Agriculture, Rehovot 76100, Israel
Role of ethylene biosynthesis and auxin content and transport in high temperature-induced abscission of pepper reproductive organs
High temperatures induced abscission of pepper (Capsicum annuum L. cv. Maor) reproductive organs at various developmental stages. The role of ethylene biosynthesis and auxin economy in high temperature-induced abscission is described. High temperatures somewhat increased ethylene production in the reproductive organs, but the highest temperature treatment, which was the most active in inducing reproductive organ abscission, decreased it. In contrast to ethylene, 1-aminocyclopropane-1-carboxylic acid levels increased significantly in response to high temperatures and correlated positively with the increase in temperature. High temperatures reduced indole-3-acetic acid levels and particularly auxin transport capacity in the reproductive organs. The data suggest that the reduction of auxin transport capacity is the major mechanism by which high temperatures induce reproductive organ abscission in pepper.
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