Micropylar Pollen Tube Guidance by Egg Apparatus 1 of Maize-Reference-Cited by-同舟云学术

Micropylar Pollen Tube Guidance by Egg Apparatus 1 of Maize

Published:2005-01-28 Issue:5709 Volume:307 Page:573-576
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Márton Mihaela L.¹²,Cordts Simone¹²,Broadhvest Jean¹²,Dresselhaus Thomas¹²

Affiliation:

1. Biocenter Klein Flottbek, Developmental Biology and Biotechnology, University of Hamburg, Ohnhorststrasse 18, D-22609 Hamburg, Germany.

2. Bayer BioScience N.V., Technologiepark 38, B-9052 Ghent, Belgium.

Abstract

Pollen tube guidance precedes the double fertilization of flowering plants. Here, we report the identification of a small maize protein of 94 amino acids involved in short-range signaling required for pollen tube attraction by the female gametophyte. ZmEA1 is exclusively expressed in the egg apparatus, consisting of the egg cell and two synergids. Chimeric ZmEA1 fused to green fluorescent protein (ZmEA1:GFP) was first visible within the filiform apparatus and later was localized to nucellar cell walls below the micropylar opening of the ovule. Transgenic down-regulation of the ZmEA1 gene led to ovule sterility caused by loss of close-range pollen tube guidance to the micropyle.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference17 articles.

1. Experimental Analysis of the Fertilization Process

2. Pollen-tube guidance: beacons from the female gametophyte

3. Pollen Tube Growth and Guidance Is Regulated by POP2, an Arabidopsis Gene that Controls GABA Levels

4. A pollen tube growth-promoting arabinogalactan protein from Nicotiana alata is similar to the tobacco TTS protein

5. Chemocyanin, a small basic protein from the lily stigma, induces pollen tube chemotropism

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