Frost, Abscisic Acid, and Desiccation Hasten Embryo Development in Brassica napus
نویسندگان
چکیده
منابع مشابه
Effects of gibberellin, abscisic acid and embryo desiccation on normal plantlet regeneration, secondary embryogenesis and callogenesis in microspore culture of Brassica napus L. cv. PF704
Most of the microspore-derived embryos can not regenerate normally in rapeseed. The effects of gibberellins (GA3), abscisic acid (ABA), and embryo desiccation on normal plantlet regeneration were studied. The donor plants were grown in a growth chamber at day/night temperatures of 15/10˚C with a 16/8h photoperiod, respectively. Microspores were isolated from whole buds of 2.5-3.5mm in length, c...
متن کاملStorage oil breakdown during embryo development of Brassica napus (L.).
In this study it is shown that at least 10% of the major storage product of developing embryos of Brassica napus (L.), triacylglycerol, is lost during the desiccation phase of seed development. The metabolism of this lipid was studied by measurements of the fate of label from [1-(14)C]decanoate supplied to isolated embryos, and by measurements of the activities of enzymes of fatty acid cataboli...
متن کاملSeed Storage Protein Transcription and mRNA Levels in Brassica napus during Development and in Response to Exogenous Abscisic Acid.
Transcription rates and mRNA levels for Brassica napus seed storage protein families, cruciferin and napin, have been determined in embryos developing in the seed, as well as in embryos cultured with and without abscisic acid. Cruciferin and napin mRNAs are high during the cell expansion phase of embryo development, representing as much as 11 and 8%, respectively, of the total embryo mRNA. Duri...
متن کاملControl of Seed Germination by Abscisic Acid : III. Effect on Embryo Growth Potential (Minimum Turgor Pressure) and Growth Coefficient (Cell Wall Extensibility) in Brassica napus L.
The physical mechanism of seed germination and its inhibition by abscisic acid (ABA) in Brassica napus L. was investigated, using volumetric growth (= water uptake) rate (dV/dt), water conductance (L), cell wall extensibility coefficient (m), osmotic pressure ( product operator(i)), water potential (Psi(i)), turgor pressure (P), and minimum turgor for cell expansion (Y) of the intact embryo as ...
متن کاملEndogenous Gibberellins and Shoot Growth and Development in Brassica napus.
Greenhouse-grown oilseed rape (Brassica napus, annual Canola variety ;Westar') plants were harvested at six dates from the vegetative phase until the early pod (silique)-fill/late flowering stage. Endogenous gibberellin (GA)-like substances were extracted from stems, purified, and chromatographed on silica gel partition columns prior to bioassay in serial dilution using the ;Tan-ginbozu' dwarf ...
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ژورنال
عنوان ژورنال: Plant Physiology
سال: 1992
ISSN: 0032-0889,1532-2548
DOI: 10.1104/pp.99.2.700