Endophytic Phytohormone Production and Utilization of Functional Traits in Plant Growth Promotion

Sharma, Aahuti; Kumar, Pankaj; Pahal, Vikas; Kumar, Jitendra; Pandey, Shiv Shankar

doi:10.1007/978-981-19-5029-2_15

Cited by 3 publications

(2 citation statements)

References 93 publications

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“…For example, plant growth-promoting rhizobacteria (PGPR), have useful influences on plants, increasing the overall yield of crops and helping to mitigate the effects of abiotic stresses through a variety of mechanisms [24]. Plant growth-promoting rhizobacteria can enhance growth by changing the levels of key hormones, e.g., ethylene production decreases within the plant body through the activity of the 1-aminocyclopropane-1-carboxylate (ACC) deaminase enzyme or IAA production [25]. Under saline conditions, endophyte strains expressing ACC deaminase activities were found to ameliorate salt stress conditions and improve growth by reducing the levels of ethylene in stressed plants [26].…”

Section: Introductionmentioning

confidence: 99%

Halotolerant Endophytic Bacteria Regulate Growth and Field Performance of Two Durum Wheat Genotypes with Contrasting Salinity Tolerance Potential

Albdaiwi,

Al-Sayaydeh,

Al-Rifaee

et al. 2024

Plants

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Soil salinity hampers durum wheat plant growth and development at various stages. The detrimental effects of salinity on plant cellular and physiological processes necessitate strategies to alleviate its negative impact and improve overall crop yield. This study investigates the efficacy of plant growth-promoting rhizobacteria (PGPR) bacteria inoculation in mitigating salinity stress on two durum wheat genotypes with contrasting degrees of salinity tolerance (Tamaroi, salt-sensitive and Line 5004, salt-tolerant) under greenhouse and field conditions. For this purpose, two halotolerant-PGPR strains, Pseudomonas jordanii strain G34 and Oceanobacillus jordanicus strain GSFE11, were utilized for the inoculation. For the greenhouse experiment, the two selected genotypes were subjected to salinity at the flag leaf stage with continuous irrigation with a Hoagland solution supplemented with 50 mM NaCl. Field experiments were conducted across two locations with contrasting salinity levels over two growing seasons. At the end of both experiments, various parameters including total weight, spike weight, grain weight, spike number, spikelet number, grains per spike and thousand kernel weight were measured. The halotolerant PGPRs, P. jordanii strain G34 and O. jordanicus strain GSFE11, proved effective in alleviating salinity-induced adverse effects and enhancing growth under greenhouse and field conditions. However, bacterial inoculation significantly improved growth in the salt-sensitive genotype and such effects were not observed in the tolerant genotype, emphasizing genotype-specific responses. Notably, inoculation with O. jordanicus increased Na+ and Ca2+ uptake in the salt-tolerant “Line 5004” without hindering growth, suggesting one of its potential mechanisms for salt tolerance. This research demonstrates the potential of halotolerant-PGPR inoculation in enhancing durum wheat production in saline environments, but also underscores the importance of understanding genotype-specific responses for tailored interventions.

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Section: Introductionmentioning

confidence: 99%

Halotolerant Endophytic Bacteria Regulate Growth and Field Performance of Two Durum Wheat Genotypes with Contrasting Salinity Tolerance Potential

Albdaiwi,

Al-Sayaydeh,

Al-Rifaee

et al. 2024

Plants

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“…The close relationship between plant growth-promoting endophytes (PGPEs) and plant tissues facilitates the exchange of nutrients and enzymes within the plant. It is believed that endophytic microorganisms produce growthpromoting hormones that are distributed in plant tissues to foster plant growth (Sharma et al, 2023). Indole-3-acetic acid (IAA) is such hormone that plays specific roles in plant growth by promoting root development, enhancing nutrient uptake and increasing crop yield by reducing synthetic chemicals and fostering sustainable agriculture practices.…”

Section: Introductionmentioning

confidence: 99%

Divulgence into Mung Bean Growth Promotion Potential of Endophytes Isolated Across Different Geographical Regions of India

Roopashree,

Prasad,

Kumar

et al. 2024

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Background: Endophytic fungi in symbiotic association with their host plant are well known to improve plant growth and reduce the adverse effects of abiotic stresses. Therefore, fungal endophytes are beginning to receive increased attention in an effort to find growth-promoting strains that could be applied to enhance crop yield and quality. Methods: In our study, the plant growth promoting activities of endophytic fungi isolated from various parts of India have been revealed and investigated. Fungal isolates were identified using molecular taxonomical methods, while their plant growth promoting abilities were evaluated in plate assays and in vitro studies. Altogether, seven strains were selected, representing the genera Fusarium, Chaetomium and Ulocladium. Result: Six of the isolates possessed phosphate solubilization activities, four secreted siderophores and four showed amylase activity, while all of them were able to produce indoleacetic acid (IAA). In order to investigate the effect of endophytes on plant growth, all seven fungi were selected concerning their potential ability to promote growth in mung bean. The results indicated that microbial endophytes selected from different geographical regions living originally in the plant host are able to influence the growth and fitness parameters of other plants through their promotion effects and could be used as inoculants to establish a sustainable crop production system.

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The Combination Between Super Absorbent Polymers (SAPs) and Biofertilizers Could be an Ecofriendly Approach for Soil Chemical Properties Improving and Sustainable Wheat (Triticum Sativum) Production in Sandy Loam Soil

Negim,

Moharam,

Elsayed

et al. 2024

J Soil Sci Plant Nutr

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Sustainable agriculture aims to provide food needs while improving soil health and protecting it from degradation and contamination from excessive chemical fertilizer use. Sandy-textured soils have low fertility and water-holding capacity. This study assessed the integrated impact of super absorbent polymers (SAPs) and biofertilizer application on the soil chemical characteristics and wheat growth parameters in sandy loam soil. Two super absorbent polymers (SAPs) included Barbary plant G3 (P1) and Aqua Gool polymer (P2), and four microbial inoculations (Trichoderma harzianum (T), Actinomycetes (Streptomyces rochei and Streptomyces atrovirens) (AC1 and AC2), and Bacillus subtilis (B)) as biofertilizers were used in our pot experiment. The SAPs were applied to soil at a level of 0.2% (w/w), while biofertilizers were applied in the form of microbial cell suspensions (50 ml per pot) in addition to treating wheat seed with these suspensions during cultivation. Wheat plants were irrigated every 8 days to field capacity level. Amending soil with super absorbent polymers and microbes either individually or in combination significantly reduced pH and EC, increased organic matter level, and the availability of macro- and micronutrients in soil. Wheat growth metrics, including shoot length, tiller number, biomass accumulation, leaf area, and grain yield, exhibited considerable enhancements relative to the plants of the control treatment. The interaction between P1 polymer and Streptomyces atrovirens (AC2) showed the highest performance in improving the almost studied parameters. The application of SAPs with microbial biofertilizers offers a promising eco-friendly method for enhancing soil health and wheat yield.

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Endophytic Phytohormone Production and Utilization of Functional Traits in Plant Growth Promotion

Cited by 3 publications

References 93 publications

Halotolerant Endophytic Bacteria Regulate Growth and Field Performance of Two Durum Wheat Genotypes with Contrasting Salinity Tolerance Potential

Halotolerant Endophytic Bacteria Regulate Growth and Field Performance of Two Durum Wheat Genotypes with Contrasting Salinity Tolerance Potential

Divulgence into Mung Bean Growth Promotion Potential of Endophytes Isolated Across Different Geographical Regions of India

The Combination Between Super Absorbent Polymers (SAPs) and Biofertilizers Could be an Ecofriendly Approach for Soil Chemical Properties Improving and Sustainable Wheat (Triticum Sativum) Production in Sandy Loam Soil

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