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Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit
BACKGROUND: Calcium (Ca) deficiency can cause apple bitter pit, reduce the quality and shelf life. WRKY transcription factors play essential role in plant response to multiple disorders. However, the underlying mechanisms causing bitter pit in apple fruit due to Ca deficiency during storage is extre...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8851858/ https://www.ncbi.nlm.nih.gov/pubmed/35176994 http://dx.doi.org/10.1186/s12870-022-03453-8 |
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author | Sun, Chen Zhang, Weiwei Qu, Haiyong Yan, Longfei Li, Lixia Zhao, Yuqi Yang, Hongqiang Zhang, Hua Yao, Gaifang Hu, Kangdi |
author_facet | Sun, Chen Zhang, Weiwei Qu, Haiyong Yan, Longfei Li, Lixia Zhao, Yuqi Yang, Hongqiang Zhang, Hua Yao, Gaifang Hu, Kangdi |
author_sort | Sun, Chen |
collection | PubMed |
description | BACKGROUND: Calcium (Ca) deficiency can cause apple bitter pit, reduce the quality and shelf life. WRKY transcription factors play essential role in plant response to multiple disorders. However, the underlying mechanisms causing bitter pit in apple fruit due to Ca deficiency during storage is extremely limited. RESULTS: In the present study, the nutritional metabolites and reactive oxygen species (ROS) were compared in Ca-deficient and healthy apple fruit (CK) during storage. Results showed that Ca-deficient apples sustained significantly higher production of ROS, PPO activity, flavonoids, total phenol, total soluble solids (TSS), and sucrose contents, but the contents of Ca, H(2)O(2), titratable acids (TA), glucose and fructose were significantly lower than those of CK during storage. Principal component analysis (PCA) showed that TSS, •O(2)(−), PPO, malondialdehyde (MDA) and Ca were the main factors, and TSS had a positive correlation with sucrose. Furthermore, transcriptome analysis revealed that WRKYs were co-expressed with sucrose metabolism-related enzymes (SWEETs, SS, SPS). qRT-PCR and correlation analysis indicated that MdWRKY75 was correlated positively with MdSWEET1. Moreover, transient overexpression of MdWRKY75 could significantly increase the sucrose content and promote the expression of MdSWEET1 in apple fruit. CONCLUSIONS: Calcium deficiency could decrease antioxidant capacity, accelerate nutritional metabolism and up-regulate the expression of WRKYs in apple with bitter pit. Overexpression of MdWRKY75 significantly increased sucrose accumulation and the expression of MdSWEET1. These findings further strengthened knowledge of the basic molecular mechanisms in calcium deficiency apple flesh and contributed to improving the nutritional quality of apple fruit. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03453-8. |
format | Online Article Text |
id | pubmed-8851858 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-88518582022-02-22 Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit Sun, Chen Zhang, Weiwei Qu, Haiyong Yan, Longfei Li, Lixia Zhao, Yuqi Yang, Hongqiang Zhang, Hua Yao, Gaifang Hu, Kangdi BMC Plant Biol Research BACKGROUND: Calcium (Ca) deficiency can cause apple bitter pit, reduce the quality and shelf life. WRKY transcription factors play essential role in plant response to multiple disorders. However, the underlying mechanisms causing bitter pit in apple fruit due to Ca deficiency during storage is extremely limited. RESULTS: In the present study, the nutritional metabolites and reactive oxygen species (ROS) were compared in Ca-deficient and healthy apple fruit (CK) during storage. Results showed that Ca-deficient apples sustained significantly higher production of ROS, PPO activity, flavonoids, total phenol, total soluble solids (TSS), and sucrose contents, but the contents of Ca, H(2)O(2), titratable acids (TA), glucose and fructose were significantly lower than those of CK during storage. Principal component analysis (PCA) showed that TSS, •O(2)(−), PPO, malondialdehyde (MDA) and Ca were the main factors, and TSS had a positive correlation with sucrose. Furthermore, transcriptome analysis revealed that WRKYs were co-expressed with sucrose metabolism-related enzymes (SWEETs, SS, SPS). qRT-PCR and correlation analysis indicated that MdWRKY75 was correlated positively with MdSWEET1. Moreover, transient overexpression of MdWRKY75 could significantly increase the sucrose content and promote the expression of MdSWEET1 in apple fruit. CONCLUSIONS: Calcium deficiency could decrease antioxidant capacity, accelerate nutritional metabolism and up-regulate the expression of WRKYs in apple with bitter pit. Overexpression of MdWRKY75 significantly increased sucrose accumulation and the expression of MdSWEET1. These findings further strengthened knowledge of the basic molecular mechanisms in calcium deficiency apple flesh and contributed to improving the nutritional quality of apple fruit. SUPPLEMENTARY INFORMATION: The online version contains supplementary material available at 10.1186/s12870-022-03453-8. BioMed Central 2022-02-17 /pmc/articles/PMC8851858/ /pubmed/35176994 http://dx.doi.org/10.1186/s12870-022-03453-8 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data. |
spellingShingle | Research Sun, Chen Zhang, Weiwei Qu, Haiyong Yan, Longfei Li, Lixia Zhao, Yuqi Yang, Hongqiang Zhang, Hua Yao, Gaifang Hu, Kangdi Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title | Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title_full | Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title_fullStr | Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title_full_unstemmed | Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title_short | Comparative physiological and transcriptomic analysis reveal MdWRKY75 associated with sucrose accumulation in postharvest ‘Honeycrisp’ apples with bitter pit |
title_sort | comparative physiological and transcriptomic analysis reveal mdwrky75 associated with sucrose accumulation in postharvest ‘honeycrisp’ apples with bitter pit |
topic | Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8851858/ https://www.ncbi.nlm.nih.gov/pubmed/35176994 http://dx.doi.org/10.1186/s12870-022-03453-8 |
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