Physiological and transcriptome analyses reveal the photosynthetic response to drought stress in drought-sensitive (Fengjiao) and drought-tolerant (Hanjiao) Zanthoxylum bungeanum cultivars

As an important economical plant, is widely cultivated in arid and semi-arid areas. The studies associated with photosynthesis under drought stress were widely carried out, but not yet in . Here, the photosynthesis of two cultivars (FJ, cv. "Fengjiao"; HJ, cv. "Hanjiao") was anal...

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Published inFrontiers in plant science Vol. 13; p. 968714
Main Authors Hu, Haichao, He, Beibei, Ma, Lei, Chen, Xin, Han, Peilin, Luo, Yingli, Liu, Yonghong, Fei, Xitong, Wei, Anzhi
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 06.09.2022
Subjects
drought stress
photosynthetic rate
Plant Science
transcription factor
transcriptome
WGCNA
Zanthoxylum bungeanum
transcription factor
Zanthoxylum bungeanum
drought stress
WGCNA
photosynthetic rate
transcriptome
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Summary:As an important economical plant, is widely cultivated in arid and semi-arid areas. The studies associated with photosynthesis under drought stress were widely carried out, but not yet in . Here, the photosynthesis of two cultivars (FJ, cv. "Fengjiao"; HJ, cv. "Hanjiao") was analyzed under drought stress using physiological indicators and transcriptome data. Drought decreased stomatal aperture and stomatal conductance (Gsw), reduced transpiration rate (E) and sub-stomatal CO concentration (Ci), and lowered chlorophyll and carotenoid content, which reduced the net photosynthetic rate (Pn) of . The higher photosynthetic rate in HJ stemmed from its higher chlorophyll content, larger stomatal aperture and Gsw, and higher Ci. Weighted gene co-expression network analysis (WGCNA) identified several ABA signal transduction genes ( , , and ), LCH-encoding genes ( ), and chlorophyll metabolism genes ( , , and ). Additionally, seven transcription factor genes were identified as important factors regulating photosynthesis under drought conditions. In general, a photosynthetic response model under drought stress was built firstly in , and the key genes involved in photosynthesis under drought stress were identified. Therefore, the results in our research provide important information for photosynthesis under drought and provided key clues for future molecular breeding in .
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Reviewed by: Kenji Miura, University of Tsukuba, Japan; Jun You, Oil Crops Research Institute (CAAS), China
Edited by: Ji-Hong Liu, Huazhong Agricultural University, China
This article was submitted to Plant Abiotic Stress, a section of the journal Frontiers in Plant Science
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2022.968714