ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum Gaud.
نویسندگان
چکیده
منابع مشابه
ABA inhibits germination but not dormancy release in mature imbibed seeds of Lolium rigidum Gaud.
Dormancy release in imbibed annual ryegrass (Lolium rigidum Gaud.) seeds is promoted in the dark but inhibited in the light. The role of abscisic acid (ABA) in inhibition of dormancy release was found to be negligible, compared with its subsequent effect on germination of dormant and non-dormant seeds. Inhibitors of ABA metabolism had the expected effects on seed germination but did not influen...
متن کاملA potential role for endogenous microflora in dormancy release, cytokinin metabolism and the response to fluridone in Lolium rigidum seeds.
BACKGROUND AND AIMS Dormancy in Lolium rigidum (annual ryegrass) seeds can be alleviated by warm stratification in the dark or by application of fluridone, an inhibitor of plant abscisic acid (ABA) biosynthesis via phytoene desaturase. However, germination and absolute ABA concentration are not particularly strongly correlated. The aim of this study was to determine if cytokinins of both plant ...
متن کاملSelection for low or high primary dormancy in Lolium rigidum Gaud seeds results in constitutive differences in stress protein expression and peroxidase activity
Seed dormancy in wild Lolium rigidum Gaud (annual ryegrass) populations is highly variable and not well characterized at the biochemical level. To identify some of the determinants of dormancy level in these seeds, the proteomes of subpopulations selected for low and high levels of primary dormancy were compared by two-dimensional polyacrylamide gel electrophoresis of extracts from mature, dry ...
متن کاملمطالعه آت‌اکولوژی گونه Lolium rigidum Gaud. در استان مازندران
مطالعات آت‌اکولوژی (aut-ecologi)، اطلاعاتی بنیادی برای مدیریت اکوسیستم‌های مرتعی به وجود می‌آورد. در این تحقیق، آت‌اکولوژی Lolium rigidum با نام فارسی چچم بررسی شده است. ابتدا پراکنش جغرافیایی، فنولوژی، گونه‌های گیاهی همراه، ضریب خشکی، ویژگی‌های فیزیکوشیمیایی خاک، بررسی‌های اقلیمی و سایر عوامل مؤثر بر پراکنش این گونه، از جمله تغییرات ارتفاعی در 9 رویشگاه انتخابی از استان مازندران بررسی شد. سپس ...
متن کاملDark-mediated dormancy release in stratified Lolium rigidum seeds is associated with higher activities of cell wall-modifying enzymes and an apparent increase in gibberellin sensitivity.
Dormancy release in freshly matured, imbibed annual ryegrass (Lolium rigidum) seeds is inhibited by light and involves a decrease in seed sensitivity to abscisic acid. Other processes involved in dormancy release in the dark were investigated by measuring seed storage compound mobilisation and the activity of cell wall-degrading enzymes. Activities of endo-β-mannanase and total peroxidase were ...
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ژورنال
عنوان ژورنال: Journal of Experimental Botany
سال: 2009
ISSN: 0022-0957,1460-2431
DOI: 10.1093/jxb/erp175