Here, we investigated changes in the transcriptomic data of the stem tissue of transgenic tobacco (Nicotiana tabacum) with LkABCG36 and LkABCG40 (Larix kaempferi) overexpression, and compared them with those of the wild type (WT). In contrast, the functions of the ABCG36 and ABCG40 transporters have received considerably less attention. The ABCG subfamily of proteins are involved in the process of plant vegetative organ development. ĪTP-binding cassette transporters (ABC transporters) play crucial physiological roles in plants, such as being involved in the growth and development of organs, nutrient acquisition, response to biotic and abiotic stress, disease resistance, and the interaction of the plant with its environment. This study provides a better understanding of how Populus responses to drought that could be useful for improving tolerance to stress in Populus. We also suggest ARF2 -like and PYL4 -like genes as potential markers for use in breeding programs. In particular, the findings showed that MYBs and MAPKs have a prominent role in the drought stress response that could be considered to improve the drought tolerance of Populus. The differential gene coexpression analysis highlighted two acetyltransferase NATA1 -like and putative cytochrome P450 genes that have a special contribution in response to drought stress. These changes were more associated with the response to stress, cellular catabolic process, metabolic pathways, and hormone-related genes. Our analysis revealed that large transcriptional variations occur during drought stress. Here, we first used meta-analysis and machine learning methods to identify water stress-responsive genes and then performed a systematic approach to discover important gene networks. Nevertheless, how these changes in Populus are not fully understood. In Populus, drought is a major problem affecting plant growth and development which can be closely reflected by corresponding transcriptomic changes. In this review, our aim was to present a detailed overview of different facets of the crosstalk between the antagonistic plant hormones abscisic acid (ABA) and auxin, two phytohormones that are the main drivers of plant stress responses, on the one hand, and plant growth, on the other. Especially boosting our insight into the ways by which plants balance their growth and their defense programs appear to be of paramount importance, as this may lead to novel perspectives that can pave the way to increase agricultural productivity in a sustainable manner. For this reason, it is necessary to expand our understanding of the underlying mechanisms by which plants respond to abiotic stresses. These stressors have largely detrimental effects on plant growth and development and, therefore, put global food security in jeopardy. These stress cues are assumed to intensify in the future driven by the global climate change scenario which we are currently experiencing. Plants are constantly exposed to a variety of different environmental stresses, including drought, salinity, and elevated temperatures. These transporters can be suitably manipulated to develop ‘Plants for the Future’. These specialized plant membrane transporters ensure a sustainable economic yield and high‐quality products, especially under unfavorable conditions of growth. This review aims at giving insights on ABC transporters, their evolution, structure, functions and roles in different biological processes for helping the terrestrial plants to survive under adverse environmental conditions. ABC transporters also suppress the seed embryonic growth until favorable conditions come. Microorganisms also engage a large number of ABC transporters to import and expel substrates decisive for their pathogenesis. ABC transporters are involved in the transport of secondary metabolites inside the cells. Tonoplast‐localized ABC transporters are involved in internal detoxification of metal ion thus protecting against the DNA impairment and maintaining cell growth. In mitochondria and chloroplast, the iron metabolism and its transport across the membrane are mediated by ABC transporters. ABC proteins are involved in regulating diverse biological processes in plants, such as growth, development, uptake of nutrients, tolerance to biotic and abiotic stresses, tolerance to metal toxicity, stomatal closure, shape and size of grains, protection of pollens, transport of phytohormones, etc. These proteins are localized in the membranes of chloroplasts, mitochondria, peroxisomes and vacuoles. ABC transporters are driven by ATP hydrolysis and can act as exporters as well as importers. The ATP‐binding cassette (ABC) transporters belong to a large protein family predominantly present in diverse species.
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