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Article

Rootstock-Mediated Transcriptional Changes Associated with Cold Tolerance in Prunus mume Leaves

1
Laboratory of Fruit Tree Biotechnology, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
2
College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu 611130, China
3
Key Laboratory of Food Processing and Quality Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
*
Author to whom correspondence should be addressed.
Contributed equally to this work.
Academic Editors: Jinzhi Zhang, Pingxian Zhang and Changfei Guan
Horticulturae 2021, 7(12), 572; https://doi.org/10.3390/horticulturae7120572
Received: 10 November 2021 / Revised: 6 December 2021 / Accepted: 7 December 2021 / Published: 13 December 2021
Japanese apricot (Prunus mume) is remarkably valuable for its high ornamental and economic importance due to its distinctive features. Low temperature is a serious environmental constraint for this species, restricting its cultivation and dispersal in the north of China. To address this issue, breeding requires an understanding of the molecular mechanisms underlying responses to cold stress. We examined the leaf physiological and transcriptome profile by RNA sequencing in ‘Bungo’ scion cultivar grafted onto Prunus mume (cold-sensitive) and Prunus armeniaca (cold-tolerant) rootstocks at 4 °C for 0, 6, and 24 h. Our results revealed that the increased MDA concentration in the leaves of P. mume cultivar (cold-sensitive) suggests that cold stress might cause oxidative damage and increased sensitivity. Moreover, the cold-tolerant cultivar (P. armeniaca) considerably enhances the enzyme activities (i.e., SOD, POD, and CAT), as well as osmo-protectants (soluble sugars and proline) compared with sensitive cultivar, which helps plants to withstand oxidative damage caused by cold stress. Additionally, differentially expressed genes were shown to be enriched in plant hormone signal transduction, ribosome, MAPK signaling, and circadian rhythm pathway. After 24 h of cold stress, genes related to PYL4, histidine kinase 1, SAUR36, bHLH130, bHLH123, TIFY 6B-like, WRKY 40, WRKY 57, and 60S acidic ribosomal protein P1 were differentially expressed, implying that these DEGs involved in multiple pathways are involved in cold tolerance in Japanese apricot. This study improved our current understanding of the mechanism of cold tolerance in Japanese apricot, and the findings could be utilized for other related fruit species. View Full-Text
Keywords: Japanese apricot; cold stress; physiology; biochemical analysis; transcriptome analysis; differential expressed genes Japanese apricot; cold stress; physiology; biochemical analysis; transcriptome analysis; differential expressed genes
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MDPI and ACS Style

Hayat, F.; Ma, C.; Iqbal, S.; Huang, X.; Omondi, O.K.; Ni, Z.; Shi, T.; Tariq, R.; Khan, U.; Gao, Z. Rootstock-Mediated Transcriptional Changes Associated with Cold Tolerance in Prunus mume Leaves. Horticulturae 2021, 7, 572. https://doi.org/10.3390/horticulturae7120572

AMA Style

Hayat F, Ma C, Iqbal S, Huang X, Omondi OK, Ni Z, Shi T, Tariq R, Khan U, Gao Z. Rootstock-Mediated Transcriptional Changes Associated with Cold Tolerance in Prunus mume Leaves. Horticulturae. 2021; 7(12):572. https://doi.org/10.3390/horticulturae7120572

Chicago/Turabian Style

Hayat, Faisal, Chengdong Ma, Shahid Iqbal, Xiao Huang, Ouma K. Omondi, Zhaojun Ni, Ting Shi, Rezwan Tariq, Ummara Khan, and Zhihong Gao. 2021. "Rootstock-Mediated Transcriptional Changes Associated with Cold Tolerance in Prunus mume Leaves" Horticulturae 7, no. 12: 572. https://doi.org/10.3390/horticulturae7120572

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