ArticlePlant biotechnology journal2018
Improvement of drought tolerance by overexpressing MdATG18a is mediated by modified antioxidant system and activated autophagy in transgenic apple.
Article in Plant biotechnology journal, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 99 papers.
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99 citing papers in PubMed, 236 citations in OpenAlex.
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- Identification of ATG18s in Triticeae reveals wheat TaATG18-5's crucial role in Fusarium crown rot resistance.Plant cell reports · 2025Article
- Dehydrin Protein TaCOR410 Improves Drought Resistance of Wheat Through Autophagy.Plants (Basel, Switzerland) · 2025Article
- Identification of the ZmATG18 subfamily genes in maize and the role of ZmATG18a in drought stress.BMC genomics · 2025Article
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- The lowdown on breakdown: Open questions in plant proteolysis.The Plant cell · 2024Review
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- Jasmonate enhances cold acclimation in jojoba by promoting flavonol synthesis.Horticulture research · 2024Article
- Genome-wide identification of ATG genes and their expression profiles under biotic and abiotic stresses in Fenneropenaeus chinensis.BMC genomics · 2024Article
- Maize Autophagy-Related Protein ZmATG3 Confers Tolerance to Multiple Abiotic Stresses.Plants (Basel, Switzerland) · 2024Article
- Glucose uptake from the rhizosphere mediated by MdDOF3-MdHT1.2 regulates drought resistance in apple.Plant biotechnology journal · 2024Article
39 more citing papers are in PubMed but not listed here.
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Authors and funding
6 authors at 1 institution in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Autophagy is a major and conserved pathway for delivering and recycling unwanted proteins or damaged organelles to be degraded in the vacuoles. AuTophaGy-related (ATG) protein 18a has been established as one of the essential components for autophagy occurrence in Arabidopsis thaliana. We previously cloned the ATG18a homolog from Malus domestica (MdATG18a) and monitored its responsiveness to various abiotic stresses at the transcriptional level. However, it is still unclear what its function is under abiotic stress in apple. Here, we found that heterologous expression of MdATG18a in tomato plants markedly enhanced their tolerance to drought. Overexpression (OE) of that gene in apple plants improved their drought tolerance as well. Under drought conditions, the photosynthesis rate and antioxidant capacity were significantly elevated in OE lines when compared with the untransformed wild type (WT). Transcript levels of other important apple ATG genes were more strongly up-regulated in transgenic MdATG18a OE lines than in the WT. The percentage of insoluble protein in proportion to total protein was lower and less oxidized protein accumulated in the OE lines than in the WT under drought stress. This was probably due to more autophagosomes being formed in the former. These results demonstrate that overexpression of MdATG18a in apple plants enhances their tolerance to drought stress, probably because of greater autophagosome production and a higher frequency of autophagy. Those processes help degrade protein aggregation and limit the oxidation damage, thereby suggesting that autophagy plays important roles in the drought response.
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