کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4515992 | 1322338 | 2013 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Barley genotype expressing “stay-green”-like characteristics maintains starch quality of the grain during water stress condition
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کلمات کلیدی
SECCLDGPCDMSO - DMSOSize-exclusion chromatography - اندازه گیری کروماتوگرافی حذف شدهWater stress - تنش آب یا بحران آبChain length distribution - توزیع طول زنجیرهBarley - جو Hydrodynamic volume - حجم هیدرودینامیکیdegree of polymerisation - درجه پلیمریزاسیونDimethyl sulfoxide - دیمتیل سولفواکسیدStarch structure - ساختار نشاستهField capacity - ظرفیت میدان
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
The identification of “stay-green” in sorghum and its positive correlation with yield increases has encouraged attempts to incorporate “stay-green”-like traits into the genomes of other commercially important cereal crops. However, knowledge on the effects of “stay-green” expression on grain quality under extreme physiological stress is limited. This study examines impacts of “stay-green”-like expression on starch biosynthesis in barley (Hordeum vulgare L.) grain under mild, severe, and acute water stress conditions induced at anthesis. The proportions of long amylopectin branches and amylose branches in the grain of Flagship (a cultivar without “stay-green”-like characteristics) were higher at low water stress, suggesting that water stress affects starch biosynthesis in grain, probably due to early termination of grain fill. The changes in long branches can affect starch properties, such as the rates of enzymatic degradation, and hence its nutritional value. By contrast, grain from the “stay-green”-like cultivar (ND24260) did not show variation in starch molecular structure under the different water stress levels. The results indicate that the cultivar with “stay-green”-like traits has a greater potential to maintain starch biosynthesis and quality in grain during drought conditions, making the “stay-green”-like traits potentially useful in ensuring food security.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cereal Science - Volume 58, Issue 3, November 2013, Pages 414-419
Journal: Journal of Cereal Science - Volume 58, Issue 3, November 2013, Pages 414-419
نویسندگان
Peter W. Gous, Jovin Hasjim, Jerome Franckowiak, Glen P. Fox, Robert G. Gilbert,