Rapid changes in leaf elongation, ABA and water status during the recovery phase following application of water stress in two durum wheat varieties differing in drought tolerance
| Autor: | Abdelkrim Kameli, Thierry Simonneau, Mohamed Mahdid, Christina Ehlert |
|---|---|
| Přispěvatelé: | 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), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Faculté des sciences biologiques, Université du Québec à Rimouski (UQAR), Département des Sciences Naturelles, École normale supérieure - Kouba-Alger (ENS Kouba-Alger), Algerian Ministry of Higher Education |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Physiology Rapid responses Turgor pressure Drought tolerance Plant Science Biology 01 natural sciences Polyethylene Glycols Cell wall 03 medical and health sciences chemistry.chemical_compound Nutrient Cell Wall Osmotic Pressure Recovery Genetics [SDV.BV]Life Sciences [q-bio]/Vegetal Biology Osmotic pressure Water content Abscisic acid Triticum Durum wheat 030304 developmental biology 2. Zero hunger 0303 health sciences Dehydration fungi Water food and beverages Plant Transpiration Adaptation Physiological Droughts Plant Leaves ABA Agronomy chemistry Plant Stomata Elongation Leaf elongation rate Abscisic Acid Water status 010606 plant biology & botany |
| Zdroj: | Plant Physiology and Biochemistry Plant Physiology and Biochemistry, Elsevier, 2011, 49 (10), pp.1077-1083. ⟨10.1016/j.plaphy.2011.08.002⟩ |
| ISSN: | 0981-9428 |
| Popis: | Plant Physiol Bioch mandid_m@yahoo.fr; This study aims to investigate the role of Abscisic acid (ABA) in water potential and turgor variations as well as growth recovery during the first phase of a rapid water stress induced by PEG6000. Two wheat varieties (Triticum durum L.), MBB (more tolerant) and OZ (less productive under drought), were grown in aerated nutrient solutions. Leaf elongation kinetics of the growing leaf 3 was estimated using LVDT. Water potential was measured using a pressure chamber; osmotic potential was estimated from expressed sap of elongation zone, turgor pressure of the same zone of leaf three was estimated directly by pressure probe. Growth rapidly ceased for a period of about one hour after the addition of PEG, gradual recovery was then observed for about 2 h. A significant difference was found in the % recovery of Leaf Elongation Rate (LER) and ABA between the two varieties, leading to better water status in MBB compared to OZ. The results of this study showed the possible role of ABA on growth resumption by the increase of relative water content and turgor via osmotic adjustment during the stress period in the leaves, which indicates the importance of OA in the resumption of LER even in the short term under conditions of water deficit. Full recovery of turgor but not of LER at the end stress period suggested the possible effect on cell wall extensibility (hardening) even at short term resulting from the rapid accumulation of ABA. (C) 2011 Elsevier Masson SAS. All rights reserved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect