Drought Tolerance Associated with Proline and Hormone Metabolism in Two Tall Fescue Cultivars

By Da Man, Yongxia Bao, Liebao Han, Xunzhong Zhang. 2011

141 citations recorded by the source corpus.

Drought stress is a major factor in turfgrass management; however, the underlying mechanisms of turfgrass drought tolerance are not well understood. This greenhouse study was designed to investigate proline and hormone responses to drought stress in two tall fescue (Festuca arundinacea (Schreb.)) cultivars differing in drought tolerance. The two cultivars, Van Gogh (relatively drought-tolerant) and AST7002 (relatively drought-sensitive), were established and grown under either well-watered (maintaining 90% container capacity) or drought stress ('26% container capacity) and then re-watered. Drought stress reduced turfgrass quality, relative leaf water content (LWC), leaf indole-3-acetic acid (IAA) and cytokinin zeatin riboside (ZR) content, and increased proline and abscisic acid (ABA) content. 'Van Gogh' had greater turfgrass quality rating, LWC, proline, ABA, and ZR content relative to 'AST7002' under drought stress conditions. At the end of drought stress, leaf proline, ZR, and ABA content were 32%, 43%, and 50% higher in 'Van Gogh' relative to 'AST7002', respectively. No cultivar difference was observed under well-watered conditions. The results of this study suggest that the proline, ABA, and ZR content are associated with drought tolerance. Selection and use of the cultivars with higher proline, ABA, and ZR content under drought stress may be a practical approach to improve tall fescue drought tolerance.

Subfields: Ecology, Evolution, Behavior and Systematics, Environmental Chemistry, Nature and Landscape Conservation

View Paper: https://www.semanticscholar.org/paper/6d13ae9d946cb8eed3b9d8a2533aeea7fbf8724a

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In Environmental Chemistry

1. M. Dacosta
2. Yiwei Jiang
3. Bingru Huang
4. L. Cui
5. Jun Li
6. Yetang Wang
7. Jinglin Wang
8. A. Wahid

In Nature and Landscape Conservation

1. Yiwei Jiang
2. M. Dacosta
3. Bingru Huang

Citations in the corpus

• Effect of various drought stresses and subsequent recovery on proline, total soluble sugar and starch metabolisms in Rice (Oryza sativa L.) varieties (2019, background): “In contrast, drought-resistant genotypes of cotton, tall fescue and wheat were characterized by higher proline accumulation than the susceptible ones (Man et al., 2011; Parida et al., 2008; Sultan et al., 2012).”
• Research Advances in Mechanisms of Turfgrass Tolerance to Abiotic Stresses: From Physiology to Molecular Biology (2014, background): “Primary examples of important osmolytes contributing to OA in turfgrass species are proline (DaCosta and Huang, 2006; Man et al., 2011), soluble sugars (mainly sucrose) (Jiang and Huang, 2001a; DaCosta and Huang, 2006), and potassium (Jiang and Huang, 2001a).”
• Drought Tolerance Strategies in Plants: A Mechanistic Approach (2020, background): “The accumulation of ABA regulates the closure of stomata to reduce transpiration (Munemasa et al. 2015; Man et al. 2011).”