Autophagy-Mediated Regulation of Different Meristems in Plants

Abstract

Autophagy is a highly conserved cell degradation process that widely exists in eukaryotic cells. In plants, autophagy helps maintain cellular homeostasis by degrading and recovering intracellular substances through strict regulatory pathways, thus helping plants respond to a variety of developmental and environmental signals. Autophagy is involved in plant growth and development, including leaf starch degradation, senescence, anthers development, regulation of lipid metabolism, and maintenance of peroxisome mass. More and more studies have shown that autophagy plays a role in stress response and contributes to maintain plant survival. The meristem is the basis for the formation and development of new tissues and organs during the post-embryonic development of plants. The differentiation process of meristems is an extremely complex process, involving a large number of morphological and structural changes, environmental factors, endogenous hormones, and molecular regulatory mechanisms. Recent studies have demonstrated that autophagy relates to meristem development, affecting plant growth and development under stress conditions, especially in shoot and root apical meristem. Here, we provide an overview of the current knowledge about how autophagy regulates different meristems under different stress conditions and possibly provide new insights for future research.

Credibility assessment of cold adaptive Pseudomonas jesenni MP1 and P. palleroniana N26 on growth, rhizosphere dynamics, nutrient status, and yield of the kidney bean cultivated in Indian Central Himalaya

“…Besides, now it is an established fact that IAA production by microbes is a direct plant growth promontory mechanism, as IAA assists in plant growth, root proliferation, tissue differentiation, elongation, embryonic development, etc. ( Egamberdieva, 2011 ; Cheng et al., 2022 ). In the present study, a considerable amount of IAA production was reported by both i.e., P. jesenii MP1 and P. palleroniana N26 cold adaptive bioinoculants ranging from 28.03 ± 0.97 and 41.38 ± 1.26 µg/ml, respectively.…”

Peroxin Pex14/17 Is Required for Trap Formation, and Plays Pleiotropic Roles in Mycelial Development, Stress Response, and Secondary Metabolism in Arthrobotrys oligospora

“…Intriguingly, we observed that the terms of autophagy, mitophagy, and ubiquitin-mediated proteolysis were significantly enriched by transcriptome analysis, and subsequently, the remarkable increase in the level of autophagosome was confirmed by fluorescent staining in the Δ Aopex14/17 mutants. Autophagy plays a vital role in the maintenance of peroxisome mass, and autophagy further regulates peroxisomes and contributes to the production of ROS ( 41 ). Peroxisome abundance can be regulated by PEX genes.…”

P3/P3N-PIPO of PVY interacting with BI-1 inhibits the degradation of NIb by ATG6 to facilitate virus replication in N. benthamiana

“…Autophagy has many biological functions in plants, and it is closely related to plant growth, development, flowering, and fruiting ( Cheng et al., 2022 ). It will also cause autophagy when exposed to exogenous biotic or abiotic stress.…”