II. Heat stress in Triticum: kinetics of Cu and Zn accumulation

Abstract

The interactions between high temperatures and Cu/Zn accumulation were investigated in bread and durum wheat. Plants were grown in a greenhouse, at two different temperatures regimes (control -25/14ºC and heat stress -31/20ºC), and the contents and uptake/translocation of Cu and Zn were evaluated during three developmental stages of plant growth (booting, grain filling and maturity). During grain filling and at maturity it was found that root, shoot and spike concentrations of Cu increased in heat stressed plants of the genotypes Golia and Acalou. The same trend was observed for root and shoot concentrations of Zn in both durum wheat genotypes. It was concluded that plants submitted to high temperatures (during the grain filling period) become more efficient in the Cu translocation to the shoots.

Heat and salinity stress on the African eggplant F1 Djamba, a Kumba cultivar

“…Leaf zinc and copper concentrations were only increased at T37 when compared to T27, while T42 levels were similar to the T27 ones. The increase seen only at T37 might be due to the increased nutrient uptake of selected important nutrients for tolerance observed under a certain threshold in different species due to the maintained ATPase activity and increased water uptake to compensate for the higher transpiration, mechanisms potentially not in place at T42 in the current study (Klock et al, 1996;Dias and Lidon, 2009). Interestingly, the temperature experienced by the roots was not significantly different between the T37 and T42 treatments, both much higher than the T27 treatment (data not shown).…”

Multi-Omics Exploration of ABA Involvement in Identifying Unique Molecular Markers for Single and Combined Stresses in tomato plants

“…For heat stress in flc-mutants, key markers included humidity (H20_i), leaf temperature (CTleaf), transpiration (E), Zn 2+ , F -, Ca 2+ and Pi, along with overexpression of kat1 and increased levels of certain metabolites, such as kaempferide-3-glucoside, isovitexin 2-O-β-glucoside, trehalose 6-phosphate, adenosine 5'-monophosphate and cyclo-dopa glucuronosyl glucoside. Most of these markers have been previously associated with heat stress in plants (Wiebe and Poovaiah, 1973;Dias and Lidon, 2009;Pacak et al, 2016;Zheng et al, 2020;Laoué et al, 2022;Samineni et al, 2022;Wei et al, 2022). Notably, the K+ transporter (KAT1) is involved in K + uptake in guard cells, regulating stomatal opening or closing and transpiration (Hosy et al, 2003).…”