Effect of Water Deficit Stress and Foliar Application of Maternal Plant on Germination Characteristics of Three Barley (Hordeum vulgare) Cultivars

AbstractIn Egypt, water shortage has become a key limiting factor for agriculture. Water-deficit stress causes different morphological, physiological, and biochemical impacts on plants. Two field experiments were carried out at Etay El-Baroud Station, El-Beheira Governorate, Agriculture Research Center (ARC), Egypt, to evaluate the effect of potassium silicate (K-silicate) of maize productivity and water use efficiency (WUE). A split-plot system in the four replications was used under three irrigation intervals during the 2017 and 2018 seasons. Whereas 10, 15, and 20 days irrigation intervals were allocated in main plots, while the three foliar application treatments of K-silicate (one spray at 40 days after sowing; two sprays at 40 and 60 days; and three sprays at 40, 60, and 80 days, and a control (water spray) were distributed in the subplots. All the treatments were distributed in 4 replicates. The results indicated that irrigation every 15 days gave the highest yield in both components and quality. The highly significant of (WUE) under irrigation every 20 days. Foliar spraying of K-silicate three times resulted in the highest yield. Even under water-deficit stress, irrigation every fifteen days combined with foliar application of K-silicate three times achieved the highest values of grain yield and its components. These results show that K-silicate treatment can increase WUE and produce high grain yield requiring less irrigation.

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Exogenous Foliar Application of Glycine Betaine to Alleviate Water Deficit Tolerance in Two Indica Rice Genotypes under Greenhouse Conditions

Agronomy ◽

10.3390/agronomy9030138 ◽

2019 ◽

Vol 9 (3) ◽

pp. 138 ◽

Cited By ~ 2

Author(s):

Rujira Tisarum ◽

Cattarin Theerawitaya ◽

Thapanee Samphumphung ◽

Teruhiro Takabe ◽

Suriyan Cha-um

Keyword(s):

Water Deficit ◽

Glycine Betaine ◽

Foliar Application ◽

Amylose Content ◽

Garden Soil ◽

Water Deficit Stress ◽

Test Plant ◽

Free Proline ◽

Yield Attributes ◽

Rice Genotypes

The aim of this investigation was to enhance overall growth, yield attributes as well as physio-biochemical adaptive strategies by exogenous foliar application of glycine betaine (GlyBet) in two rice varieties against water deficit stress under greenhouse conditions. Rice crop cvs. RD43 (low amylose content) and SPR1 (high amylose content) grown in clay pots containing garden soil until booting stage were chosen as the test plant material, sprayed by 0 (control) or 100 mM GlyBet and subsequently subjected to: MWD (mild water deficit by 8 d water withholding; 24.80% SWC; Soil water content) or SWD (severe water deficit by 14 d water withholding; 13.63% SWC) or WW (well-watered conditions or control). Free proline content in cv. RD43 was rapidly increased in relation to the degree of water deficit and suppressed by exogenous GlyBet, while free proline in cv. SPR1 was lower than cv. RD43. Overall growth performances and yield traits in both cultivars under MWD were maintained by exogenous application of GlyBet; however, these parameters declined under SWD even after the GlyBet application. Degradation of photosynthetic pigments and chlorophyll fluorescence in pretreated GlyBet plants under SWD were prevented, resulting in elevated net photosynthetic rate (Pn). Interestingly, Pn was very sensitive parameter that sharply declined under SWD in both RD43 and SPR1 genotypes. Positive relationships between physio-morphological and biochemical changes in rice genotypes were demonstrated with high correlation co-efficiency. Based on the key results, it is concluded that foliar GlyBet application may play an important role in drought-tolerant enhancement in rice crops.

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Effect of water deficit stress on an Indian wheat cultivar (Triticum aestivum L. HD 2967) under ambient and elevated level of ozone

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.136837 ◽

2020 ◽

Vol 714 ◽

pp. 136837 ◽

Cited By ~ 4

Author(s):

Annesha Ghosh ◽

Madhoolika Agrawal ◽

Shashi Bhushan Agrawal

Keyword(s):

Triticum Aestivum ◽

Water Deficit ◽

Elevated Level ◽

Wheat Cultivar ◽

Triticum Aestivum L ◽

Water Deficit Stress ◽

Effect Of Water

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Assessment of Salicylic Acid Impacts on Seedling Characteristic of Cucumber (Cucumis sativus L.) under Water Stress

Notulae Scientia Biologicae ◽

10.15835/nsb417258 ◽

2012 ◽

Vol 4 (1) ◽

pp. 112-115 ◽

Cited By ~ 3

Author(s):

Hossein MARDANI ◽

Hassan BAYAT ◽

Amir Hossein SAEIDNEJAD ◽

Ehsan Eyshi REZAIE

Keyword(s):

Salicylic Acid ◽

Water Stress ◽

Water Deficit ◽

Cucumis Sativus ◽

Foliar Application ◽

Dry Weight ◽

Water Deficit Stress ◽

Cucumis Sativus L ◽

Water Stress Tolerance ◽

Randomized Design

Impacts of various concentrations of salicylic acid (SA) on cucumber (Cucumis sativus L.) seedling characteristic were evaluated under different water stress levels by using a factorial arrangement based on completely randomized design with three replications at experimental greenhouse of Ferdowsi University of Mashhad, Iran. The studied factors included three water deficit levels (100% FC, 80% FC, and 60% FC) considered as first factor and five levels of SA concentrations (0, 0.25, 0.5, 0.75, and 1 mM) as second factor. Results showed that foliar application of SA at the highest concentration enhanced leaf area, leaf and dry weight while decreased stomatal conductance under high level of water deficit stress. Though, severe water deficit stress sharply raised the SPAD reading values. In general, exogenous SA application could develop cucumber seedling characteristic and improve water stress tolerance.

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