Expression of the Pyrus sinkiangensis HD-Zip Ι transcription factor PsHB7 and PsHB12 in hybrid Broussonetia papyrifera regulates its natural overwintering

Liu, Xiaoyan; Wang, Lijuan; Zhang, Xiaoli; Li, Aowei; Xia, Wenwen; Lin, Caixia; Li, Jin; Zhu, Jianbo

doi:10.1016/j.envexpbot.2023.105534

Environmental and Experimental Botany

2023

DOI: 10.1016/j.envexpbot.2023.105534

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Expression of the Pyrus sinkiangensis HD-Zip Ι transcription factor PsHB7 and PsHB12 in hybrid Broussonetia papyrifera regulates its natural overwintering

Xiaoyan Liu,

Lijuan Wang,

Xiaoli Zhang

et al.

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2024

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Cited by 3 publications

References 37 publications

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A Bamboo HD‐Zip Transcription Factor PeHDZ72 Conferred Drought Tolerance by Promoting Sugar and Water Transport

Zhu,

Lin,

Liu

et al. 2024

Plant Cell & Environment

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Drought drastically affects plant growth, development and productivity. Plants respond to drought stress by enhancing sugar accumulation and water transport. Homeodomain‐leucine zipper (HD‐Zip) transcription factors (TFs) participate in various aspects of plant growth and stress response. However, the internal regulatory mechanism of HD‐Zips in moso bamboo (Phyllostachys edulis) remains largely unknown. In this study, we identified an HD‐Zip member, PeHDZ72, which was highly expressed in bamboo shoots and roots and was induced by drought. Furthermore, PeSTP_46019, PeSWEET_23178 and PeTIP4‐3 were identified as downstream genes of PeHDZ72 in moso bamboo by DAP‐seq. The expressions of these three genes were all induced by drought stress. Y1H, DLR and GUS activity assays demonstrated that PeHDZ72 could bind to three types of HD‐motifs in the promoters of these three genes. Overexpression of PeHDZ72 led to a remarkable enhancement in drought tolerance in transgenic rice, with significantly improved soluble sugar and sucrose contents. Meanwhile, the expressions of OsSTPs, OsSWEETs and OsTIP were all upregulated in transgenic rice under drought stress. Overall, our results indicate that drought stress might induce the expression of PeHDZ72, which in turn activated downstream genes PeSTP_46019, PeSWEET_23178 and PeTIP4‐3, contributing to the improvement of cellular osmotic potential in moso bamboo in response to drought stress.

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A Bamboo HD‐Zip Transcription Factor PeHDZ72 Conferred Drought Tolerance by Promoting Sugar and Water Transport

Zhu,

Lin,

Liu

et al. 2024

Plant Cell & Environment

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Chromosome-level genome provides new insight into the overwintering process of Korla pear (Pyrus sinkiangensis Yu)

Xia,

Wang,

Liu

et al. 2024

BMC Plant Biol

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Korla pear has a unique taste and aroma and is a breeding parent of numerous pear varieties. It is susceptible to Valsa mali var. pyri , which invades bark wounded by freezing injury. Its genetic relationships have not been fully defined and could offer insight into the mechanism for freezing tolerance and disease resistance. We generated a high-quality, chromosome-level genome assembly for Korla pear via the Illumina and PacBio circular consensus sequencing (CCS) platforms and high-throughput chromosome conformation capture (Hi-C). The Korla pear genome is ~ 496.63 Mb, and 99.18% of it is assembled to 17 chromosomes. Collinearity and phylogenetic analyses indicated that Korla might be derived from Pyrus pyrifolia and that it diverged ~ 3.9-4.6 Mya. During domestication, seven late embryogenesis abundant ( LEA ), two dehydrin ( DHN ), and 54 disease resistance genes were lost from Korla pear compared with P. betulifolia . Moreover, 21 LEA and 31 disease resistance genes were common to the Korla pear and P. betulifolia genomes but were upregulated under overwintering only in P. betulifolia because key cis elements were missing in Korla pear. Gene deletion and downregulation during domestication reduced freezing tolerance and disease resistance in Korla pear. These results could facilitate the breeding of novel pear varieties with high biotic and abiotic stress resistance. Supplementary Information The online version contains supplementary material available at 10.1186/s12870-024-05490-x.

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Saussurea involucrata SiLEA5 Enhances Tolerance to Drought Stress in Solanum lycopersicum

Liu,

Li,

Luo

et al. 2024

Foods

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Drought adversely affects plant growth, which leads to reduced crop yields and exacerbates food insecurity. Late embryogenesis abundant (LEA) proteins are crucial for plants’ responses to abiotic stresses. This research further investigates the role of SiLEA5 by utilizing transgenic tomatoes under drought stress. The expression of SiLEA5 was upregulated under drought and abscisic acid (ABA) treatment, resulting in decreased electrolyte leakage and malondialdehyde content, alongside increased levels of osmotic regulators and antioxidant enzyme activity. These biochemical alterations reduce oxidative damage and enhance drought resistance. qRT-PCR analysis revealed the upregulation of ABA signaling genes and key enzymes involved in proline biosynthesis (P5CS) and dehydrin (DHN) synthesis under drought stress. Additionally, overexpression of SiLEA5 increased the net photosynthetic rate (Pn) and fruit yield of tomatoes by regulating stomatal density and aperture. These findings suggest that SiLEA5 may be a potential target for improving drought tolerance in tomatoes and other crops.

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Expression of the Pyrus sinkiangensis HD-Zip Ι transcription factor PsHB7 and PsHB12 in hybrid Broussonetia papyrifera regulates its natural overwintering

Cited by 3 publications

References 37 publications

A Bamboo HD‐Zip Transcription Factor PeHDZ72 Conferred Drought Tolerance by Promoting Sugar and Water Transport

A Bamboo HD‐Zip Transcription Factor PeHDZ72 Conferred Drought Tolerance by Promoting Sugar and Water Transport

Chromosome-level genome provides new insight into the overwintering process of Korla pear (Pyrus sinkiangensis Yu)

Saussurea involucrata SiLEA5 Enhances Tolerance to Drought Stress in Solanum lycopersicum

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