Publications by authors named "Denver Walitang"

Organic fertilizer application in agricultural land is known to improve soil microbial processes, fertility, and yield. In particular, the changes in soil chemical composition due to multi-year application of organic fertilizers are thought to alter the microbial community. Here, the effects of organic fertilization with oil-cake amendments (OC) on soil bacterial diversity, community profile, and enzyme activity were evaluated and compared to those amended with chemical fertilizer (NPK).

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Background: Rice is colonized by plant growth promoting bacteria such as Methylobacterium leading to mutually beneficial plant-microbe interactions. As modulators of the rice developmental process, Methylobacterium influences seed germination, growth, health, and development. However, little is known about the complex molecular responsive mechanisms modulating microbe-driven rice development.

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Pathogenesis-related (PR) signaling plays multiple roles in plant development under abiotic and biotic stress conditions and is regulated by a plethora of plant physiological as well as external factors. Here, our study was conducted to evaluate the role of an ACC deaminase-producing endophytic bacteria in regulating ethylene-induced PR signaling in red pepper plants under salt stress. We also evaluated the efficiency of the bacteria in down-regulating the PR signaling for efficient colonization and persistence in the plant endosphere.

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is a plant-growth-promoting bacterium capable of colonizing and promoting growth in numerous crops of agronomic and horticultural significance. The objective of the present study is to develop CW903- flocculating cells and to test their performance in promoting the growth of red pepper plants grown under salt stress. The flocculating CW903-S recorded 12.

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The omics-based studies are important for identifying characteristic proteins in plants to elucidate the mechanism of ACC deaminase producing bacteria-mediated salt tolerance. This study evaluates the changes in the proteome of rice inoculated with ACC deaminase producing bacteria under salt-stress conditions. Salt stress resulted in a significant decrease in photosynthetic pigments, whereas inoculation of Methylobacterium oryzae CBMB20 had significantly increased pigment contents under normal and salt-stress conditions.

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Salinity induces myriad of physiological and biochemical perturbations in plants and its amelioration can be attained by the use of potential bacterial synthetic communities. The use of microbial consortia in contrast to single bacterial inoculation can additively enhance stress tolerance and productivity of agricultural crops. In this study, co-inoculation of Pseudomonas koreensis S2CB45 and Microbacterium hydrothermale IC37-36 isolated from arbuscular mycorrhizal fungi (AMF) spore and rice seed endosphere, respectively, were used to evaluate the physiological and biochemical effects on red pepper at two salt concentrations (75 mM and 150 mM).

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The rapid rise in global temperature has adverse effects on rice productivity. The lack of eminent resources for heat stress alleviation is threatening the agricultural sector. Heat stress alleviation by endophytic plant growth-promoting bacteria (PGPB) can be a sustainable and eco-friendly approach.

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Article Synopsis
  • There are diverse bacterial communities in rice seeds that are passed down from parent plants to their offspring, influencing the endophyte composition.
  • A study found that the richness, evenness, and diversity of these bacterial communities can change over generations due to crossbreeding, inbreeding, and environmental factors.
  • Key bacterial groups like Herbaspirillum, Microbacterium, and others may form a "core microbiota," suggesting they consistently play a significant role in shaping the endophytic communities in rice seeds across different locations and generations.
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Background: Inherent characteristics and changes in the physiology of rice as it attains salt tolerance affect the colonizing bacterial endophytic communities of the rice seeds. These transmissible endophytes also serve as a source of the plant's microbial community and concurrently respond to the host and environmental conditions. This study explores the influence of the rice host as well as the impact of soil salinity on the community structure and diversity of seed bacterial endophytes of rice with varying tolerance to salt stress.

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Background: Rice (Oryza sativa L. ssp. indica) seeds as plant microbiome present both an opportunity and a challenge to colonizing bacterial community living in close association with plants.

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A wide range of C3 and C4 plant species could acclimatize and grow under the impact of salinity stress. Symbiotic relationship between plant roots and arbuscular mycorrhizal fungi (AMF) are widespread and are well known to ameliorate the influence of salinity stress on agro-ecosystem. In the present study, we sought to understand the phenomenon of variability on AMF symbiotic relationship on saline stress amelioration in C3 and C4 plants.

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