The Interactive Effect Between Water Stress and Foliar Spraying With Ascorbic Acid or Hydrogen Peroxide on Wheat Productivity

Abstract

Two field experiments were carried out at a private farm at Manchat Nabhan, Fakose, Sharkia Governorate, Egypt during 2017/18 and 2018/19 winter seasons. The study aimed to find out the effect of five exogenous application levels of AsA and H 2 O 2 (S0: without, S1:100 ppm AsA, S2: 200ppm AsA, S3: 30mM H 2 O 2 and S4: 60mM H 2 O 2 ) on wheat (Triticum asetivum, L. cv.Misr 1) under three treatments of irrigation water (4, 5 and 6 irrigations) using surface irrigation system. A randomized complete block split plot design with three replicates was used in each season. The irrigation treatments and the levels of AsA and H 2 O 2 were randomly allocated in the main and sub-plots, respectively. The most important findings could be summarized as follows: At 105 days from planting, wheat plants under water stress (irrigation four times) without AsA and H 2 O 2 application showed a significant decrease in leaf area index (LAI), relative water content (RWC %) and total chlorophyll in comparison to wheat plants under well watered in both seasons. In general, the highest values of these traits were significantly gained from the highest concentration of ascorbic acid (200 ppm) and H 2 O 2 (60mM) in both seasons. At maturity, in both seasons, irrigations 4 times significantly resulted in lower spikes number m -2 , 1000-grain weight and grain yields than those in the plots irrigated 6 times. Generally, the maximum values of these traits were significantly obtained from the highest levels of ascorbic acid and H 2 O 2 in both seasons. Under stressed and unstressed plants, increasing AsA and H 2 O 2 levels significantly improved all these traits.

Effect of Irrigation Intervals and Foliar Spray with Salicylic Acid on the production of Two Bread wheat cultivars in Newly Reclaimed Land

“…Wheat plants irrigated with 4 irrigations increase significantly leaf area index, plant height, spike length, number of spikelets spike -1 , and grain yield as compared to plots irrigated with 2 or 3 irrigations (Kanwal et al, 2020). Kotb et al, (2021) cleared that irrigation 6 times significantly resulted in increased spikes number m -2 , 1000-grain weight, and grain yields of wheat compared with the plots irrigated 4 times. The maximum values for plant height, number of spikes m -2 , number of grains spike -1 1000-grain weight, flag leaf area, and grain yield were obtained from wheat plants that received four irrigations compared to plants irrigated twice across the growing seasons (El-Nagar and EL-Gohary, 2022).…”

“…Furthermore, enough irrigation water may help the plant to absorb its need for water and nutrients as well as increased the grain-filling period (El-Hendawy, 2016). Drought stress leads to decreased fresh and dry matter production (Gora et al, 2022), total chlorophyll, and photosynthesis (Shalaby et al, 2020), and thus reduced the spike length (Kanwal et al, 2020), flag leaf area (El-Sarag and Ismaeil, 2013), grains weight spike -1 and 1000-grain weight (Al-Zahy et al, 2020 andKotb et al, 2021), grain yield (El-Nagar and EL-Gohary, 2022), and increased WUE (Taha et al, 2017). Xu et al (2016) cleared that the increase in WUE was produced from 60 mm water applied at elongation, attaining a relatively high grain yield, whereas enough irrigation with180 mm water applied increased grain yield but decreased WUE.…”

Evaluation of some Bread Wheat Cultivars Under Irrigation Intervals 1: Grain Yield, Its Attributes and Water Use Efficiency

“…(El-Hendawy, 2016). On the other hand, the production of fresh and dry matter is thought to be reduced by drought stress (Gora et al, 2022), which in turn can reduce spike length (Kanwal et al, 2020), the yield of grains (El-Nagar and EL-Gohary, 2022), 1000grain weight and weight of grains spike (Al-Zahy et al, 2020 andKotb et al, 2021), and increase WUE. According to Taha et al, 2017, sufficient irrigation with 180 mm of applied water enhanced grain yield but lowered WUE.…”