Journal ArticleDOI
Improving Drought Tolerance by Exogenous Application of Glycinebetaine and Salicylic Acid in Sunflower
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TLDR
The effects of water stress and foliar application of GB were more pronounced when applied at the flowering stage than at the vegetative stage, and exogenous GB application was only beneficial under stress conditions.Abstract:
Water shortage is a severe threat to the sustainability of crop production. Exogenous application of glycinebetaine (GB) and salicylic acid (SA) has been found very effective in reducing the adverse affects of drought stress. This study was conducted to examine the possible role of exogenous GB and SA application in improving the yield of hybrid sunflower (Helianthus annuus L.) under different irrigation regimes. There were three levels of irrigation, viz. control (normal irrigations), water stress at vegetative stage (irrigation missing at vegetative stage) and water stress at flowering stage (irrigation missing at flowering stage). GB and SA were applied exogenously at 100 and 0.724 mm, respectively, each at the vegetative and at the flowering stage. Control plants did not receive application of GB and SA. Water stress reduced the head diameter, number of achene, 1000-achene weight, achene yield and oil yield. Nevertheless, exogenous GB and SA application significantly improved these attributes under water stress. However, drought stress increased the free leaf proline and GB, and were further increased by exogenous application of GB and SA. However, exogenous GB application at the flowering stage was more effective than other treatments. Oil contents were also reduced under water stress; however, GB and SA application could not ameliorate the negative effect of water stress on achene oil contents. The effects of water stress and foliar application of GB were more pronounced when applied at the flowering stage than at the vegetative stage. Moreover, exogenous GB application was only beneficial under stress conditions.read more
Citations
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Journal ArticleDOI
Plant drought stress: effects, mechanisms and management
Muhammad Farooq,Muhammad Farooq,Abdul Wahid,Nobuya Kobayashi,Daisuke Fujita,Shahzad M. A. Basra +5 more
TL;DR: The effects of drought stress on the growth, phenology, water and nutrient relations, photosynthesis, assimilate partitioning, and respiration in plants, and the mechanism of drought resistance in plants on a morphological, physiological and molecular basis are reviewed.
Journal ArticleDOI
Crop Production under Drought and Heat Stress: Plant Responses and Management Options
Shah Fahad,Ali Ahsan Bajwa,Usman Nazir,Shakeel Ahmad Anjum,Ayesha Farooq,Ali Zohaib,Sehrish Sadia,Wajid Nasim,Steve W. Adkins,Shah Saud,Shah Saud,Muhammad Ihsan,Hesham F. Alharby,Chao Wu,Depeng Wang,Jianliang Huang,Jianliang Huang +16 more
TL;DR: A comprehensive account of conventional as well as modern approaches to deal with heat and drought stresses have been presented here and a side-by-side critical discussion on salient responses and management strategies for these two important abiotic stresses provides a unique insight into the phenomena.
Journal ArticleDOI
Morphological, physiological and biochemical responses of plants to drought stress
TL;DR: The ability and strategies of higher plants to respond and adapt to drought stress are focused on, including the critical roles of osmolyte accumulation under drought stress conditions.
Book ChapterDOI
Drought stress in plants: an overview
Muhammad Farooq,Muhammad Farooq,Muhammad Farooq,Mubshar Hussain,Mubshar Hussain,Abdul Wahid,Kadambot H. M. Siddique,Kadambot H. M. Siddique +7 more
TL;DR: An overview of plant drought stress, its effects on plants’ resistance mechanisms and management strategies to cope with drought stress is provided.
Journal ArticleDOI
Exogenously applied polyamines increase drought tolerance of rice by improving leaf water status, photosynthesis and membrane properties.
TL;DR: It was revealed that drought stress severely reduced the rice fresh and dry weights, while PAs application improved net photosynthesis, water use efficiency, leaf water status, production of free proline, anthocyanins and soluble phenolics and improved membrane properties.
References
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Journal ArticleDOI
Rapid determination of free proline for water-stress studies
TL;DR: In this article, a simple colorimetric determination of proline in the 0.1 to 36.0 μmoles/g range of fresh weight leaf material was presented.
Journal ArticleDOI
Roles of glycine betaine and proline in improving plant abiotic stress resistance
Muhammad Ashraf,Majid R. Foolad +1 more
TL;DR: In this review article, numerous examples of successful application of these compounds to improve plant stress tolerance are presented and a better understanding of the mechanisms of action of exogenously applied GB and proline is expected to aid their effective utilization in crop production in stress environments.
Journal ArticleDOI
Plant Productivity and Environment
TL;DR: An analysis of major U.S. crops shows that there is a large genetic potential for yield that is unrealized because of the need for better adaptation of the plants to the environments in which they are grown.
Journal ArticleDOI
Living with water stress: evolution of osmolyte systems
TL;DR: Osmolyte compatibility is proposed to result from the absence of osmolytes interactions with substrates and cofactors, and the nonperturbing or favorable effects of oSMolytes on macromolecular-solvent interactions.
Journal ArticleDOI
Role of Salicylic Acid in Plants
TL;DR: Salicylic Acid : A Likely Signal for Disease Resistance in Plants and Search for Calorigen, and Other Effects of Exogenously Applied Salicylic acid.
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