Monitoring Drought Tolerance Mechanisms of Sorghum and Maize Under Unevenly Distributed Precipitation

Varování

Publikace nespadá pod Pedagogickou fakultu, ale pod Přírodovědeckou fakultu. Oficiální stránka publikace je na webu muni.cz.

Autoři	FRANTOVÁ Nicole RÁBEK Michal PORČOVÁ Lenka JOVANOVIĆ Ivana ŠIRŮČEK Petr LUKAS Vojtěch HÁJEK Josef ELZNER Petr HOLKOVÁ Ludmila SMUTNÁ Pavlína SMUTNÝ Vladimír STŘEDA Tomáš CERKAL Radim
Rok publikování	2024
Druh	Článek v odborném periodiku
Časopis / Zdroj	International Journal of Plant Production
Fakulta / Pracoviště MU	Přírodovědecká fakulta
Citace
www	https://link.springer.com/article/10.1007/s42106-023-00278-9
Doi	http://dx.doi.org/10.1007/s42106-023-00278-9
Klíčová slova	Water limitation; VCI; Rain distribution; Maize; Sorghum; RWC; Proline; Stomatal density
Popis	The study examines the morpho-physiological differences in leaf characteristics between two species of C4 plants: sorghum and maize. The research was conducted in field conditions where plants were rainfed. Both species different varieties were cultivated at two distinct sites that exhibited variations in soil texture and drought stress incidence according to the vegetation condition index (VCI). Samples were collected during various growth stages to analyze the relative water content (RWC), proline levels, and stomatal density. Sorghum plants displayed higher RWC, proline levels, and stomatal density than maize plants. In sorghum, the biochemical traits, such as the proline content, may play a more critical role in withstanding water-limited conditions than in maize in our experiment. Under the same water restriction period, sorghum showed higher RWC levels. Sorghum plants reduced stomatal density under more water-limited conditions, which proves its plasticity. Additionally, early maturation played a crucial role in both species. The early sorghum variety KWS Kallisto and maize variety Walterinio KWS had a more stable yield at both sites. Nevertheless, the highest yields were found in the later varieties, KWS Hannibal and KWS Inteligens. The higher proline levels and the relative water content are drought-tolerant mechanisms and may be used to indicate drought intensity in field conditions. Our findings spotlight the influence of genetic diversity and genotype-environment interactions in determining crop responses to drought stress, providing valuable information for future breeding programs to enhance drought tolerance in crops.