PJB-2019-318
Physiological and multigenic characteristics of widely used tree and herbaceous peonies in response to field stress in Yanqing, Beijing, China
Wensi Tang, Longjun Chao, Arshad Iqbal, Wenbiao Zhang, Jing Ding and Huafang Wang
Abstract
There are nine Chinese indigenous tree peony species including Paeonia suffruticosa and Paeonia rockii, which have hundreds of traditional ornamental cultivars widely grown in China and other countries we assessed the adaptability of four peonies to this specific site using field trials. Four one-, two-, and three-year old plants of different varieties or cultivars were grown unprotected and their growth, 13 physiological criteria, and the sequence and expression characteristics of three gene homologs in response to the severe field conditions were assessed. The growth of three-year old plants was significantly different from the others. The membership function values of the four peonies in decreasing order were as follows: P. ostii var. lishizhenii > P. suffruticosa ‘Wulong Pengsheng’ (with P. ostii var. lishizhenii used as the rootstock). > P. rockii ‘Bingshan Xuelian’ > P. lactiflora ‘Taohong Yushuang’. Some differences in the nucleotide or amino acid sequences of the dehydration responsive element binding protein 2A (DREB2A), WRKY19, and xyloglucan endotransglycosylase (XET) multigenes were observed between species. The phylogenetic tree based on conserved DREB2A sequences clustered into one branch with all four peony species, branches of P. ostii and other varieties for WRKY, and three branches of P. ostii, P. rockii, and other identified sub-clusters for XET. Gene expression analysis using quantitative reverse transcription-polymerase chain reaction divided the four peonies into two groups: stress-insensitive (P. ostii var. lishizhenii, P. rockii ‘Bingshan Xuelian’) and stress-sensitive (P. suffruticosa ‘Wulong Pengsheng’ and P. lactiflora ‘Taohong Yushuang’). Notably, both groups adapted to field stress at the site in Yanqing, Beijing, albeit to different degrees. Together, these results indicate the importance of exploring the characteristics of peony adaptability to inform their relative suitability for specific horticultural applications.
To Cite this article:
Tang, W., L. Chao, A. Iqbal, W. Zhang, J. Ding and H. Wang. 2021. Physiological and multigenic characteristics of widely used tree and herbaceous peonies in response to field stress in Yanqing, Beijing, China. Pak. J. Bot., 53(1): DOI: http://dx.doi.org/10.30848/PJB2021-1(43)
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