Open Wide! Exine Patterning and Aperture Formation in Arabidopsis Pollen
نویسندگان
چکیده
منابع مشابه
Role of Glycosyltransferases in Pollen Wall Primexine Formation and Exine Patterning.
The pollen cell wall is important for protection of male sperm from physical stresses and consists of an inner gametophyte-derived intine layer and a sporophyte-derived exine layer. The polymeric constituents of the robust exine are termed sporopollenin. The mechanisms by which sporopollenin is anchored onto microspores and polymerized in specific patterns are unknown, but the primexine, a tran...
متن کاملATP-binding cassette transporter G26 is required for male fertility and pollen exine formation in Arabidopsis.
The highly resistant biopolymer, sporopollenin, gives the outer wall (exine) of spores and pollen grains their unparalleled strength, shielding these structures from terrestrial stresses. Despite a limited understanding of the composition of sporopollenin, it appears that the synthesis of sporopollenin occurs in the tapetum and requires the transport of one or more sporopollenin constituents to...
متن کاملABCG26-mediated polyketide trafficking and hydroxycinnamoyl spermidines contribute to pollen wall exine formation in Arabidopsis.
Pollen grains are encased by a multilayered, multifunctional wall. The sporopollenin and pollen coat constituents of the outer pollen wall (exine) are contributed by surrounding sporophytic tapetal cells. Because the biosynthesis and development of the exine occurs in the innermost cell layers of the anther, direct observations of this process are difficult. The objective of this study was to i...
متن کاملDEX1, a novel plant protein, is required for exine pattern formation during pollen development in Arabidopsis.
To identify factors that are required for proper pollen wall formation, we have characterized the T-DNA-tagged, dex1 mutation of Arabidopsis, which results in defective pollen wall pattern formation. This study reports the isolation and molecular characterization of DEX1 and morphological and ultrastructural analyses of dex1 plants. DEX1 encodes a novel plant protein that is predicted to be mem...
متن کاملRole of Glycosyltransferases in Pollen Wall Primexine Formation and Exine Patterning1[OPEN]
The pollen cell wall is important for protection of male sperm from physical stresses and consists of an inner gametophytederived intine layer and a sporophyte-derived exine layer. The polymeric constituents of the robust exine are termed sporopollenin. The mechanisms by which sporopollenin is anchored onto microspores and polymerized in specific patterns are unknown, but the primexine, a trans...
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ژورنال
عنوان ژورنال: The Plant Cell
سال: 2012
ISSN: 1040-4651,1532-298X
DOI: 10.1105/tpc.112.241110