Source:http://linkedlifedata.com/resource/pubmed/id/16669024
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
2010-6-29
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pubmed:abstractText |
The role of abscisic acid (ABA) in the dormancy induction of tomato (Lycopersicon esculentum) seeds was studied by comparison of the germination behavior of the ABA-deficient sitiens mutant with that of the isogenic wild-type genotype. Freshly harvested mutant seeds, in contrast to wild-type seeds, always readily germinate and even exhibit viviparous germination in overripe fruits. Crosses between mutant and wild-type and self-pollination of heterozygous plants show that in particular the ABA fraction of embryo and endosperm is decisive for the induction of dormancy. After-ripened wild-type seeds fully germinate in water but are more sensitive toward osmotic inhibition than mutant seeds. Germination of both wild-type and mutant seeds is equally sensitive toward inhibition by exogenous ABA. ABA content of mature wild-type seeds is about 10-fold the level found in mutant seeds. Nevertheless, it is argued that the differences in dormancy between the seeds of both genotypes are not a result of actual ABA levels in the mature seeds or fruits but a result of differences in ABA levels during seed development. It is hypothesized that the high levels of ABA that occur during seed development in wild-type seeds induce an inhibition of cell elongation of the radicle that can still be observed after long periods of dry storage.
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16662982,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16662983,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16664118,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16666101,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16667385,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16669024-16668727
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pubmed:language |
eng
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pubmed:journal | |
pubmed:status |
PubMed-not-MEDLINE
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pubmed:month |
Jul
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pubmed:issn |
0032-0889
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
99
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
952-8
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pubmed:dateRevised |
2010-9-15
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pubmed:year |
1992
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pubmed:articleTitle |
Dormancy and Germination of Abscisic Acid-Deficient Tomato Seeds : Studies with the sitiens Mutant.
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pubmed:affiliation |
Department of Plant Physiology, Agricultural University Wageningen, Arboretumlaan 4, NL6703 BD Wageningen, The Netherlands.
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pubmed:publicationType |
Journal Article
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