Mechanisms underlying legume–rhizobium symbioses

Yang, Jun; Lan, Liying; Ye, Jin; Yu, Nan; Wang, Dong; Wang, Ertao

doi:10.1111/jipb.13207

Cited by 103 publications

(47 citation statements)

References 283 publications

(368 reference statements)

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“…Rhizobia can convert atmospheric N into ammonium for absorption and utilization by legumes, and in turn, rhizobia can obtain nutrients and carbon sources from the plants to maintain growth ( Müller, 2021 ). Advances in our understanding of symbiotic N fixation have been well summarized in several excellent review papers ( Oldroyd et al., 2011 ; Udvardi and Poole, 2013 ; Ferguson et al., 2019 ; Yang et al., 2022 ). However, few genes involved in coordinately regulating NO 3 – signaling and the rhizobial symbiosis have been identified to date.…”

Section: Influence Of Environmental Factors On Nitrate Signalingmentioning

confidence: 99%

Nitrate signaling and use efficiency in crops

Gao

Qi²

2022

Plant Communications

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Section: Influence Of Environmental Factors On Nitrate Signalingmentioning

confidence: 99%

Nitrate signaling and use efficiency in crops

Gao

Qi²

2022

Plant Communications

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“…4c-d). Stable plant-diazotrophe symbiosis is built upon extensive carbon flow from the host plant to the microbes, accompanied by nitrogen flow in reverse (Bennett et al, 2020, Yang et al, 2022.…”

Section: Tissue-specific Gene Expression In Mucilage-secreting Aerial...mentioning

confidence: 99%

Microbiota-mediated nitrogen fixation and homeostasis in aerial root-mucilage

Pang

Mao

et al. 2022

Preprint

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Plants sustain intimate relationships with diverse microbes. While it is well recognized that these plant-associated microbiota shape individual performance and fitness of host plants, how they exert their function and maintain their homeostasis are largely unexplored. Here, using the pink lady plant (Heterotis rotundifolia) as a model, we investigated the phenomenon of microbiota-mediated nitrogen fixa-tion as well as the proximal homeostasis mechanisms of this process in the aerial root mucilage. The aerial root mucilage is enriched in primary metabolites such as carbohydrates, and abundant diazo-trophic bacteria. Nitrogen-labeled experiments and gene expression analysis indicate that the aerial root-mucilage microhabitat fixes atmospheric nitrogen to support plant growth. The presence of a key "police" fungus in the mucilage helps the host plant to defend against environmental microbes rather than diazotrophs. The discovery of new biological function and “police” fungi in the aerial root-mucilage microhabitat provides insights into microbial homeostasis maintenance of microenvironmental function and rhizosphere ecology.

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“…Infection and nodule organogenesis are the concern of early nodulin genes while the nodule function, maintenance of the oxygen level by leghaemoglobin, etc., are regulated by the products of late nodulin genes (Lebedeva et al, 2021). Cytokinin is responsible for inducing the expression of early nodulin genes in legumes, cortical cell division, and ultimately, the formation of a nodulin-like structure (Yang et al, 2022). Mens et al (2018) studied the role of cytokinin in the nodulation of soybean plants.…”

Section: Impact Of Cytokinins On Root Nodulationmentioning

confidence: 99%

Cytokinin biosynthesis in cyanobacteria: Insights for crop improvement

Uniyal

Bhandari²,

Singh³

et al. 2022

Front. Genet.

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Cytokinins, a type of phytohormones that induce division of cytoplasm, have considerable value in agriculture due to their influences on several physiological processes of plants such as morphogenesis, development of chloroplast, seed dormancy, leaf senescence, etc. Previously, it was assumed that plants obtain cytokinin from the soil produced by microbes as these hormones were first discovered in soil-inhabiting bacteria i.e., Agrobacterium tumefaciens. Later, the cytokinin biosynthesis gene, i.e., ipt gene, has been reported in plants too. Though plants synthesize cytokinins, several studies have reported that the exogenous application of cytokinins has numerous beneficial effects including the acceleration of plant growth and boosting economic yield. Cyanobacteria may be employed in the soil not only as the source of cytokinins but also as the source of other plant growth-promoting metabolites. These organisms biosynthesize the cytokinins using the enzyme isopentenyl transferases (IPTs) in a fashion similar to the plants; however, there are few differences in the biosynthesis mechanism of cytokinins in cyanobacteria and plants. Cytokinins are important for the establishment of interaction between plants and cyanobacteria as evidenced by gene knockout experiments. These hormones are also helpful in alleviating the adverse effects of abiotic stresses on plant development. Cyanobacterial supplements in the field result in the induction of adventitious roots and shoots on petiolar as well as internodal segments. The leaf, root, and stem explants of certain plants exhibited successful regeneration when treated with cyanobacterial extract/cell suspension. These successful regeneration practices mark the way of cyanobacterial deployment in the field as a great move toward the goal of sustainable agriculture.

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Mechanisms underlying legume–rhizobium symbioses

Cited by 103 publications

References 283 publications

Nitrate signaling and use efficiency in crops

Nitrate signaling and use efficiency in crops

Microbiota-mediated nitrogen fixation and homeostasis in aerial root-mucilage

Cytokinin biosynthesis in cyanobacteria: Insights for crop improvement

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