Gametophyte–Sporophyte Interactions in the Pollen–Pistil System: 4. The Hormonal Status and the Mechanism of Self-Incompatibility

Gametophyte–Sporophyte Interactions in the Pollen–Pistil System: 4. The Hormonal Status and... Following 4 and 8 h after self-incompatible pollination of Petunia hybrida plants, ethylene evolution and the contents of IAA, ABA, and cytokinins were measured in pistils and their parts (stigma, style, and ovary). The germination and initial growth of pollen tubes within the initial 4 h of the experiment were accompanied with an almost tenfold increase of the rate of ethylene production by the stigma and a twofold increase of the ABA content in the stigma and style. The inhibition of pollen tube growth in the style tissues during next 4 h coincided with a fivefold increase in the cytokinin content in the style, while high ABA content was maintained in the stigma and style. The authors conclude that phytohormones participate in the mechanism of gametophyte self-incompatibility. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

Gametophyte–Sporophyte Interactions in the Pollen–Pistil System: 4. The Hormonal Status and the Mechanism of Self-Incompatibility

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Publisher
Springer Journals
Copyright
Copyright © 2004 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/B:RUPP.0000028688.92937.64
Publisher site
See Article on Publisher Site

Abstract

Following 4 and 8 h after self-incompatible pollination of Petunia hybrida plants, ethylene evolution and the contents of IAA, ABA, and cytokinins were measured in pistils and their parts (stigma, style, and ovary). The germination and initial growth of pollen tubes within the initial 4 h of the experiment were accompanied with an almost tenfold increase of the rate of ethylene production by the stigma and a twofold increase of the ABA content in the stigma and style. The inhibition of pollen tube growth in the style tissues during next 4 h coincided with a fivefold increase in the cytokinin content in the style, while high ABA content was maintained in the stigma and style. The authors conclude that phytohormones participate in the mechanism of gametophyte self-incompatibility.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 18, 2004

References

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