SEXUAL REPRODUCTION IN FLOWERING PLANTS

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Author : Scott  D.  Russell & Christian  Dumas

Published in : Academic  Press

ISBN : 978-0123645432

File Type : pdf

File Size :34.8 mb

Language : English

Description

In  1987,  K.  L.  Giles and  J.  Prakesh edited a special volume of the  Internutional  Review  of  Cytology  entitled “Pollen: Cytology and Development” in which the state of pollen research at that time was described. Since then, sexual reproduction  in  flowering plants has undergone a surprising series of  revolutions. Tremendous progress has been made in understanding self-incompatibility  in  angiosperms through cloning, sequencing, and  localizing both genes and gene products related  to  this phenomenon (see contributions by Dickinson  et  al.,  Singh and Kao, and Trick and Heizmann). This work has also provided evidence of a membrane-bound protein kinase containing an extracellular domain closely homologous to the S-gene that is involved in pollen-pistil incompatibility that also seems to  be associated with a more general role of signal transduction in plants (at least  in  sporophytic self-incompatibility systems). Similar progress has been made in understanding gametophytic gene expression, including both “early” genes, expressed from meiosis to the microspore stage, and  a class of “late” genes, typically linked with gametophytic function (see
Mascarenhas, and Davies  et  ul.).