Relatıonshıps between stomatal conductance and yıeld under defıcıt ırrıgatıon ın maıze (Zea mays L.)

Abstract

This study was conducted to evaluate the adaptability of maize hybrids under water deficit condition by measuring of stomatal conductance with the corresponding yield of maize hybrids. Seven maize hybrids were grown at two different irrigation regimes (well water and deficit water conditions) at the agricultural research area of Cukurova University, Adana, Turkey. The results of study indicated that at drought stress (deficit water) remarkably influenced maize yield. The hybrid Sancia produced maximum grain yield under water deficient condition while 71May69 hybrid achieved the higher yield under wellwatered condition. Stomatal conductance was strongly correlated with grain yield in this study and higher stomatal conductance indicates higher grain yield, higher stomatal conductance at 7 days after pollination helps to increase grain yield. A positive and significant correlation between grain yield and stomatal conductance was observed at 7th and 21st days after anthesis (DAA). Moderately high stomatal conductance under stress condition helps to produce the highest grain yield. Based on the results, stomatal conductance can be used as selection criterion to identify the drought stress genotypes in maize under Mediterranean condition.

A comparative study for drought tolerance and yield stability in different genotypes of barley (Hordeum vulgare L.)

“…The reduction rate in grain yield under drought stress was 23 and 20 % in both seasons, respectively. Similar reduction in crops yield and yield related attributes under water deficit conditions was reported by Hassan et al (2016), EL Sabagh et al (2015), Rashwan et al (2016), EL Sabagh et al (2017) in different crops. Talebi et al (2010) reported that, under water stress conditions, biomass and plant height had more positive effect on grain yield, for this reason, the yield of grain reduced significantly under water stress mainly as a results of reduction in biomass, number of seed/spike and plant height .L7 and L11 genotypes that, produced high values for MP, YSI, STI, GMP and YI and SSI less than one, and low values of TOL.…”

Impact of water deficit stress in maize: Phenology and yield components

“…The SL was invariably higher in number than SU but, overall their number was reduced due to WDS on both surfaces of the leaves viz; SL by 10.58% in NDT and 8.00% in DT); SU by 11.95% in NDT and 10.09% in DT. The stomatal conductance decreased, which has a direct proportional relationship with yield 36 . In maize, the flag leaf and the 2 nd leaf from the top are much smaller than the 3 rd leaf from the top (LA-3).…”

Physiological Responses of Selected Vegetable Crop Species to Water Stress

“…Water stress significantly decreased the transpiration rate (37%) and stomatal conductance (26%) of maize [99]. Nevertheless, the extent of decrease in stomatal conductance depends on the growing period when the water deficiency occurred; at 7 days after anthesis of maize cultivars stomatal conductance decreased by 35% on average but at 21 days after anthesis this decrease was significantly larger (74%) under water deficiency than in well-watered cultivars [100]. In the case of tomatoes grown under non-irrigated conditions, stomatal conductance decreases from 14 to 73% depending on the weather and variety in comparison with the well-watered plants [3,32,87,101] (Table 3).…”