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Pre‐anthesis Interaction of Cytokinins and ABA in the Transport of 14 C‐sucrose to the Ear of Winter Wheat ( Triticum aestivum L.)

Pre‐anthesis Interaction of Cytokinins and ABA in the Transport of 14 C‐sucrose to the Ear of... The effect of the application of abscisic acid (ABA, 10−4 mol 1−1), benzyl adenine (BA, 10−6 mol ‐ 1−1), N6‐m‐hydroxybenzyl‐adenosine (HBA, 10−6 mol ‐ 1−1) and combinations of these cytokinins with ABA on the transport of 14C‐sucrose into the developing kernels of winter wheat, their number and mass, was studied. Growth substances were applied in the period 10 to 5 days before anthesis and their effects were examined 4 and 18 days after anthesis on ears that were detached 10 days before anthesis and then cultivated on a complete nutrient solution. The stimulating effect of HBA on the transport of 14C‐sucrose, number of kernels and their mass was higher than that of BA. ABA partly decreased the stimulating effect of cytokinins and reduced up to several days after anthesis the transport of 14C‐sucrose to the developing kernels, their number and mass. The results revealed that a higher level of cytokinins in the period before anthesis could effectively interact with the inhibiting effect of ABA in that period and influence the accumulation of assimilates in the kernels. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Agronomy and Crop Science Wiley

Pre‐anthesis Interaction of Cytokinins and ABA in the Transport of 14 C‐sucrose to the Ear of Winter Wheat ( Triticum aestivum L.)

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Publisher
Wiley
Copyright
Copyright © 1992 Wiley Subscription Services, Inc., A Wiley Company
ISSN
0931-2250
eISSN
1439-037X
DOI
10.1111/j.1439-037X.1992.tb01031.x
Publisher site
See Article on Publisher Site

Abstract

The effect of the application of abscisic acid (ABA, 10−4 mol 1−1), benzyl adenine (BA, 10−6 mol ‐ 1−1), N6‐m‐hydroxybenzyl‐adenosine (HBA, 10−6 mol ‐ 1−1) and combinations of these cytokinins with ABA on the transport of 14C‐sucrose into the developing kernels of winter wheat, their number and mass, was studied. Growth substances were applied in the period 10 to 5 days before anthesis and their effects were examined 4 and 18 days after anthesis on ears that were detached 10 days before anthesis and then cultivated on a complete nutrient solution. The stimulating effect of HBA on the transport of 14C‐sucrose, number of kernels and their mass was higher than that of BA. ABA partly decreased the stimulating effect of cytokinins and reduced up to several days after anthesis the transport of 14C‐sucrose to the developing kernels, their number and mass. The results revealed that a higher level of cytokinins in the period before anthesis could effectively interact with the inhibiting effect of ABA in that period and influence the accumulation of assimilates in the kernels.

Journal

Journal of Agronomy and Crop ScienceWiley

Published: Oct 1, 1992

References