Comparison of Heat and Drought Stress Responses among Twelve Tartary Buckwheat (Fagopyrum tataricum) Varieties

Abstract

The use of orphan crops could mitigate the effects of climate change and improve the quality of food security. We compared the effects of drought, high temperature, and their combination in 12 varieties of Tartary buckwheat (Fagopyrum tataricum). Plants were grown at 21/19 °C or 28/26 °C under well-watered and water-stressed conditions. Plants were more discriminated according to environmental conditions than variety, with the exception of Islek that was smaller and produced fewer leaves, inflorescences, and seeds than the other varieties. The combination of high temperature and water stress had a stronger negative impact than each stress applied separately. The temperature increase stimulated leaf and flower production while water stress decreased plant height. Leaf area decreased with both temperature and water stress. High temperature hastened the seed initiation but negatively affected seed development such that almost all seeds aborted at 28 °C. At 21 °C, water stress significantly decreased the seed production per plant. At the physiological level, water stress increased the chlorophyll content and temperature increased the transpiration rate under well-watered conditions. High temperature also increased the polyphenol and flavonoid concentrations, mainly in the inflorescences. Altogether, our results showed that water stress and temperature increase in particular negatively affected seed production in F. tataricum.

Cultivar-dependent and drought-induced modulation of secondary metabolites, adaptative defense in Fagopyrum esculentum L

“…While some plants exhibit substantial declines in chlorophyll and carotenoid levels under drought stress (Mibei et al 2016 ; Raja et al 2020 ), variations in chlorophyll and carotenoid responses are influenced by plant sensitivity to drought stress (Rustioni and Bianchi 2021 ). Interestingly, some instances, such as water stress in tataricum buckwheat, can lead to augmented chlorophyll content (Aubert and Quinet 2022 ).…”

Comparison of Salt Stress Tolerance among Two Leaf and Six Grain Cultivars of Amaranthus cruentus L.

“…In a study of salinity resistance in 25 African rice cultivars ( Oryza glaberrima ), Prodjinoto et al also found that plants were better discriminated by salt dose than by genotype [ 63 ]. Similarly, in a comparison of 12 Tartary buckwheat ( Fagopyrum tataricum ) cultivars, the response to water and heat stress was better explained by the differences between plants than the cultivar [ 64 ].…”

Phytochemistry, Bioactivities of Metabolites, and Traditional Uses of Fagopyrum tataricum

“…The research in Liangshan reveal that the activity of enzymes involved in the synthesis of flavonoids is positively correlated with the content of Tartary buckwheat flavonoids [ 44 ]. High temperatures are affecting the increase of polyphenol and flavonoid content, mainly in the inflorescences, and so it is boosting antioxidant production in Tartary buckwheat plants [ 45 ].…”