Academic Journal
Drought affects abortion of reproductive organs by exacerbating developmentally-driven processes, via expansive growth and hydraulics
| العنوان: | Drought affects abortion of reproductive organs by exacerbating developmentally-driven processes, via expansive growth and hydraulics |
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| المؤلفون: | Turc, Olivier, Tardieu, Francois |
| المساهمون: | Écophysiologie des Plantes sous Stress environnementaux (LEPSE), Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), ANR-10-BTBR-01 (Amaizing), ANR-10-BTBR-0001,AMAIZING,Développer de nouvelles variétés de maïs pour une agriculture durable: une approche intégrée de la génomique à la sélection(2010), European Project: 244374,EC:FP7:KBBE,FP7-KBBE-2009-3,DROPS(2010) |
| المصدر: | ISSN: 0022-0957. |
| بيانات النشر: | HAL CCSD Oxford University Press (OUP) |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Carbon status, Expansive growth, Grain abortion, Maize, Ovary abortion, Water deficit, Grain set, Hydraulics, [SDV.CAN]Life Sciences [q-bio]/Cancer |
| الوصف: | International audience ; Abortion of reproductive organs is a major limiting factor of yield under water deficit, but is also a trait selected for by evolutionary processes. Youngest reproductive organs must be prone to abortion so older organs can finish their development in case of limited resources. Water deficit increases natural abortion via two developmentally-driven processes, namely a signal from the first fertilized ovaries and a simultaneous arrest of the expansive growth of all ovaries at a precise stage. In maize (Zea mays) subjected to water deficits typically encountered in dryland agriculture, these developmental mechanisms account for 90 % of drought-associated abortion and are irreversible three days after silk emergence. Consistently, transcripts and enzyme activities suggest that the molecular events associated with abortion affect expansive growth in silks whereas ovaries keep a favourable carbon status. Abortion due to carbon starvation is only observed for severe drought scenarios occurring after silking. Both kinetic and genetic evidence indicate that vegetative and reproductive structures share a partly common hydraulic control of expansive growth. Hence, the control of expansive growth of reproductive structures probably has a prominent effect on abortion for mild water deficits occurring at flowering time, while carbon starvation dominates in severe post-flowering drought scenarios. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | info:eu-repo/grantAgreement/EC/FP7/244374/EU/Drought-tolerant yielding plants/DROPS; PRODINRA: 424218; WOS: 000434795300007 |
| DOI: | 10.1093/jxb/ery078 |
| الاتاحة: | https://hal.inrae.fr/hal-02627500 https://hal.inrae.fr/hal-02627500v1/document https://hal.inrae.fr/hal-02627500v1/file/Turc-JEB-2018-manuscript-LEPSE_1.pdf https://doi.org/10.1093/jxb/ery078 |
| Rights: | http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| رقم الانضمام: | edsbas.9486A5EF |
| قاعدة البيانات: | BASE |
| DOI: | 10.1093/jxb/ery078 |
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