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Selection and Breeding of Suitable Crop Genotypes for Drought and Heat Periods in a Changing Climate: Which Morphological and Physiological Properties Should Be Considered?

Author

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  • Lyudmila Simova-Stoilova

    (Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bldg. 21, 1113 Sofia, Bulgaria)

  • Valya Vassileva

    (Institute of Plant Physiology and Genetics, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bldg. 21, 1113 Sofia, Bulgaria)

  • Urs Feller

    (Institute of Plant Sciences and Oeschger Center for Climate Change Research (OCCR), University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland)

Abstract

Selection and breeding of genotypes with improved drought/heat tolerance become key issues in the course of global change with predicted increased frequency of droughts or heat waves. Several morphological and physiological plant traits must be considered. Rooting depth, root branching, nutrient acquisition, mycorrhization, nodulation in legumes and the release of nutrients, assimilates or phytohormones to the shoot are relevant in root systems. Xylem embolism and its repair after a drought, development of axillary buds and solute channeling via xylem (acropetal) and phloem (basipetal and acropetal) are key processes in the stem. The photosynthetically active biomass depends on leaf expansion and senescence. Cuticle thickness and properties, epicuticular waxes, stomatal regulation including responses to phytohormones, stomatal plugs and mesophyll resistance are involved in optimizing leaf water relations. Aquaporins, dehydrins, enzymes involved in the metabolism of compatible solutes (e.g., proline) and Rubisco activase are examples for proteins involved in heat or drought susceptibility. Assimilate redistribution from leaves to maturing fruits via the phloem influences yield quantity and quality. Proteomic analyses allow a deeper insight into the network of stress responses and may serve as a basis to identify suitable genotypes, although improved stress tolerance will have its price (often lowered productivity under optimal conditions).

Suggested Citation

  • Lyudmila Simova-Stoilova & Valya Vassileva & Urs Feller, 2016. "Selection and Breeding of Suitable Crop Genotypes for Drought and Heat Periods in a Changing Climate: Which Morphological and Physiological Properties Should Be Considered?," Agriculture, MDPI, vol. 6(2), pages 1-19, June.
    • Handle: RePEc:gam:jagris:v:6:y:2016:i:2:p:26-:d:71221
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    References listed on IDEAS

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    1. E. M. Fischer & R. Knutti, 2015. "Anthropogenic contribution to global occurrence of heavy-precipitation and high-temperature extremes," Nature Climate Change, Nature, vol. 5(6), pages 560-564, June.
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    Cited by:

    1. Yangjie Ren & Yitong Zhang & Shiyang Guo & Ben Wang & Siqi Wang & Wei Gao, 2023. "Pipe Cavitation Parameters Reveal Bubble Embolism Dynamics in Maize Xylem Vessels across Water Potential Gradients," Agriculture, MDPI, vol. 13(10), pages 1-17, September.
    2. Philippe Etienne & Sylvain Diquelou & Marion Prudent & Christophe Salon & Anne Maillard & Alain Ourry, 2018. "Macro and Micronutrient Storage in Plants and Their Remobilization When Facing Scarcity: The Case of Drought," Agriculture, MDPI, vol. 8(1), pages 1-17, January.
    3. Urs Feller & Stanislav Kopriva & Valya Vassileva, 2018. "Plant Nutrient Dynamics in Stressful Environments: Needs Interfere with Burdens," Agriculture, MDPI, vol. 8(7), pages 1-6, July.

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