Amelioration of water stress effects on wetland rice by urea-N, plant growth regulators, and foliar spray of a diazotrophic bacterium Klebsiella sp.

Razi, S. S.; Sen, S. P.

doi:10.1007/bf00335922

Cited by 14 publications

(3 citation statements)

References 9 publications

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“…Spd could mitigate dehydration-induced oxidative damage by activating H 2 O 2 and calcium signaling to regulate antioxidant enzyme activities and genes associated with antioxidant functions . Similarly, urea functions as the nitrogen supply in relation to plant growth, nutrient availability, and adaptation to abiotic stress. − Foliar urea acted a positive role in provoking nitric oxide signaling and glycinebetaine metabolism to alleviate the negative effects of dehydration stress in maize . Combined with previous studies, our findings suggest that the accumulation of PAs, glycolysis, and urea are involved in CTS-induced drought resistance as the defense signaling, a source of nitrogen, and regulators of antioxidant defense and proline metabolism in white clover.…”

Section: Discussionmentioning

confidence: 99%

Metabolic Pathways Regulated by Chitosan Contributing to Drought Resistance in White Clover

et al. 2017

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Increased endogenous chitosan (CTS) could be associated with improved drought resistance in white clover (Trifolium repens). Plants were pretreated with or without 1 mg/mL CTS and then were subjected to optimal or water-limited condition in controlled growth chambers for 6 days. Phenotypic and physiological results indicated that exogenous CTS significantly improved drought resistance of white clover. Metabolome results showed that exogenous CTS induced a significant increase in endogenous CTS content during dehydration accompanied by the maintenance of greater accumulation of sugars, sugar alcohols, amino acids, organic acids, and other metabolites (ascorbate, glutathione, flavonoids, putrescine, and spermidine). These compounds are associated with osmotic adjustment, antioxidant defense, stress signaling, and energy metabolism under stress condition. Similarly, transcriptome revealed that many genes in relation to amino acid and carbohydrate metabolism, energy production and conversion, and ascorbate-glutathione and flavonoid metabolism were significantly up-regulated by CTS in response to dehydration stress. CTS-induced drought resistance was associated with the accumulation of stress protective metabolites, the enhancement of ascorbate-glutathione and tricarboxylic acid cycle, and increases in the γ-aminobutyric acid shunt, polyamine synthesis, and flavonoids metabolism contributing to improved osmotic adjustment, antioxidant capacity, stress signaling, and energy production for stress defense, thereby maintaining metabolic homeostasis under dehydration stress.

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Section: Discussionmentioning

confidence: 99%

Metabolic Pathways Regulated by Chitosan Contributing to Drought Resistance in White Clover

et al. 2017

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“…Studies have shown that drought stress reduced uptake of plant nutrients ( Razi and Sen, 1996 , Christophe et al, 2011 , Sardans and Peñuelas, 2012 , Rouphael et al, 2012 , Heckathorn et al, 2014 ). soil nutrients ( Cramer et al, 2009 , Waraich et al, 2011 , Fierer and Schimel, 2002 ) and soil enzyme activities ( Sanaullah et al, 2011 ).…”

Section: Introductionmentioning

confidence: 99%

Biochar and Arbuscular mycorrhizal fungi mediated enhanced drought tolerance in Okra (Abelmoschus esculentus) plant growth, root morphological traits and physiological properties

Jabborova

Annapurna

Al-Sadi

et al. 2021

Saudi Journal of Biological Sciences

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Drought is a major abiotic factor limiting plant growth and crop production. There is limited information on effect of interaction between biochar and Arbuscular mycorrhizal fungi (AMF) on okra growth, root morphological traits and soil enzyme activities under drought stress. We studied the influence of biochar and AMF on the growth of Okra ( Abelmoschus esculentus ) in pot experiments in a net house under drought condition. The results showed that the biochar treatment significantly increased plant growth (the plant height by 14.2%, root dry weight by 30.0%) and root morphological traits (projected area by 22.3% and root diameter by 22.7%) under drought stress. In drought stress, biochar treatment significantly enhanced the chlorophyll ‘a’ content by 32.7%, the AMF spore number by 22.8% and the microbial biomass as compared to the control. Plant growth parameters such as plant height, shoot and root dry weights significantly increased by AMF alone, by 16.6%, 21.0% and 40.0% respectively under drought condition. Other plant biometrics viz: the total root length, the root volume, the projected area and root diameter improved significantly with the application of AMF alone by 38.3%, 60.0%,16.8% and 15.9% respectively as compared with control. Compared to the control, AMF treatment alone significantly enhanced the total chlorophyll content by 36.6%, the AMF spore number by 39.0% and the microbial biomass by 29.0% under drought condition. However, the highest values of plant growth parameters (plant height, shoot dry weight, root dry weight) and root morphological traits (the total root length, root volume, projected area, root surface area) were observed in the combined treatment of biochar and AMF treatment viz: 31.9%, 34.2%, 60.0% and 68.6%, 66.6%, 45.5%, 41.8%, respectively compared to the control under drought stress. The nitrogen content, total chlorophyll content and microbial biomass increased over un-inoculated control. The soil enzymes; alkaline phosphatase, dehydrogenase and fluorescein diacetate enzyme activities significantly increased in the combined treatment by 55.8%, 68.7% and 69.5%, respectively as compared to the control under drought stress. We conclude that biochar and AMF together is potentially beneficial for cultivation of okra in drought stress conditions.

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“…In this regard, other plant growth promoting bacteria microorganisms have been useful in ameliorating water stress effects in plants. While Razi and Sen (1996) used Klebsiella spp. to study these effects in rice, Timmusk and Wagner (1999) found that Paenibacillus polymyxa could increase the expression of Arabidopsis thaliana genes associated with plant defenses to both biotic and abiotic stress.…”

Section: Introductionmentioning

confidence: 99%

Water relations and yield inAzospirillum-inoculated wheat exposed to drought in the field

Creus¹,

Sueldo²,

Barassi³

2004

Can. J. Bot.

276

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There are scarce data connecting water relations in Azospirillum-inoculated wheat suffering drought during anthesis with the yield and mineral content of grains. Azospirillum brasilense Sp245-inoculated seeds of Triticum aestivum 'Pro INTA Oasis' were sown in nonirrigated and control plots. Water potential, water content, and relative water content were determined on flag leaves. Plant water status was calculated from pressurevolume curves. At maturity, grain yield and its components were determined. P, Ca, Mg, K, Fe, Cu, and Zn were determined in dried grains. Even though the cultivar underwent osmotic adjustment, significantly higher water content, relative water content, water potential, apoplastic water fraction, and lower cell wall modulus of elasticity values were obtained in Azospirillum-inoculated plants suffering drought. Grain yield loss to drought was 26.5% and 14.1% in noninoculated and Azospirillum-inoculated plants, respectively. Grain Mg and K diminished in nonirrigated, noninoculated plots. However, grains harvested from Azospirillum-inoculated plants had significantly higher Mg, K, and Ca than noninoculated plants. Neither drought nor inoculation changed grain P, Cu, Fe, and Zn contents. A better water status and an additional "elastic adjustment" in Azospirillum-inoculated wheat plants could be crucial in promoting higher grain yield and mineral quality at harvest, particularly when drought strikes during anthesis.Key words: Azospirillum, wheat, drought, pressurevolume curves, yield, mineral content.

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Amelioration of water stress effects on wetland rice by urea-N, plant growth regulators, and foliar spray of a diazotrophic bacterium Klebsiella sp.

Cited by 14 publications

References 9 publications

Metabolic Pathways Regulated by Chitosan Contributing to Drought Resistance in White Clover

Metabolic Pathways Regulated by Chitosan Contributing to Drought Resistance in White Clover

Biochar and Arbuscular mycorrhizal fungi mediated enhanced drought tolerance in Okra (Abelmoschus esculentus) plant growth, root morphological traits and physiological properties

Water relations and yield inAzospirillum-inoculated wheat exposed to drought in the field

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