کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8357432 | 1542048 | 2015 | 18 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
AtRAV1 and AtRAV2 overexpression in cotton increases fiber length differentially under drought stress and delays flowering
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کلمات کلیدی
ABAFTLDASFLCRAVABIDPATFsTempranilloTSFeIF - EIFabscisic acid - اسید آبسزیکTem - این استTrichome - تریکومOvule development - توسعه تخمکdays after sowing - روز بعد از کاشتdays post-anthesis - روز پس از انتشاریTPR - روش پاسخ فیزیکیFiber length - طول فیبرTranscription factors - عوامل رونویسیFlorigen - فلور دوبارهdeficit irrigation - کم آبیاریFLOWERING LOCUS C - گل LOCUS C
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
There is a longstanding problem of an inverse relationship between cotton fiber qualities versus high yields. To better understand drought stress signaling and adaptation in cotton (Gossypium hirsutum) fiber development, we expressed the Arabidopsis transcription factors RELATED_TO_ABA-INSENSITIVE3/VIVIPAROUS1/(RAV1) and AtRAV2, which encode APETALA2-Basic3 domain proteins shown to repress transcription of FLOWERING_LOCUS_T (FT) and to promote stomatal opening cell-autonomously. In three years of field trials, we show that AtRAV1 and AtRAV2-overexpressing cotton had â¼5% significantly longer fibers with only marginal decreases in yields under well-watered or drought stress conditions that resulted in 40-60% yield penalties and 3-7% fiber length penalties in control plants. The longer transgenic fibers from drought-stressed transgenics could be spun into yarn which was measurably stronger and more uniform than that from well-watered control fibers. The transgenic AtRAV1 and AtRAV2 lines flowered later and retained bolls at higher nodes, which correlated with repression of endogenous GhFT-Like (FTL) transcript accumulation. Elevated expression early in development of ovules was observed for GhRAV2L, GhMYB25-Like (MYB25L) involved in fiber initiation, and GhMYB2 and GhMYB25 involved in fiber elongation. Altered expression of RAVs controlling critical nodes in developmental and environmental signaling hierarchies has the potential for phenotypic modification of crops.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Plant Science - Volume 241, December 2015, Pages 78-95
Journal: Plant Science - Volume 241, December 2015, Pages 78-95
نویسندگان
Amandeep Mittal, Yingwen Jiang, Glen L. Ritchie, John J. Burke, Christopher D. Rock,