Evaluation of Spring Wheat (20 Varieties) Adaptation to Soil Drought during Seedlings Growth Stage

Abstract

Abstract:The effect of soil drought (10 days) on the growth of plants, the accumulation of water and leakage of electrolytes, gas exchange, the contents of chl a + b and carotenoids in leaves and photochemical activity of photosystem II was studied at the seedling stage by transient fluorescent analysis in 20 of the popular varieties of polish spring wheat. Drought caused a particularly strong reduction in vigor of growth of seedlings, net photosynthesis rate and triggered an increase in electrolyte leakage from the leaves. Certain varieties during the drought demonstrated relatively intense CO 2 assimilation at low water loss through transpiration. The varieties tested were significantly different in terms of tolerance to drought of the processes of gas exchange and seedlings development. Photochemical processes in PSII showed high tolerance to drought and at the same time low differentiation among varieties. The results obtained suggested that tolerance of growth parameters to drought and CO 2 assimilation at the seedling stage may alleviate consequent depression of final yield of the grain.

Mitigating drought stress in wheat plants (Triticum Aestivum L.) through grain priming in aqueous extract of spirulina platensis

“…Additionally, the process by which a plant leaf achieves carbon gain via photosynthesis in relation to water loss through transpiration has been identified in this study as pWUE. The findings of the present investigation highlight that drought conditions led to a notable reduction in the pWUE of Shandawel 1, whereas Sakha 95 experienced a negligible decrease which aligns with studies that reported a downturn in pWUE for certain wheat strains under drought conditions [ 45 ]. This reduction in pWUE under drought circumstances might stem from the adverse impacts of stress on the rate of photosynthesis and transpiration.…”

Photosynthetic efficiency parameters as indicators of agronomic traits of winter wheat cultivars in different soil water conditions

“…As expected, drought stress treatment in three different stages of growth significantly reduced average values of GYP, BWP, WUEb, WUEg and HI in all tested genotypes. BIESAGA-KOŚCIELNIAK et al (2014) also reported a statistically significant decrease of GYP in 18 and WUE in all 20 of the tested wheat varieties caused by drought stress, when compared to the properly watered controls.…”

Response of early seedling inberd lines of wheat against 20% PEG6000 induced condition

“…Hassan et al 24 ; El-Hamamsy and Behairy, 25 and Alamri et al 26 illustrated that seedling vigor traits and tissue water content decreased with increasing of PEG and NaCl concentrations. Biesaga-Kościelniak et al, 27 reported that wheat seedlings under drought stress had considerably decreased growth vigour. Studies of correlation between several variables (Table 2) revealed a favourable and highly significant relationship between seedling length and vigour index.…”