Paclobutrazol Can Enhance the Thermal-Tolerant on Herbaceous Peony (Paeonia lactiflora)

Meng, Jiasong; Li, M.; Hao, Zhengwen; Zhao, Daqiu; Tao, Jun

doi:10.1134/s1021443722030104

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Drought stress will reduce the activity of protective enzymes in plants, lead to the accumulation of ROS in plants, resulting in the destruction of chlorophyll [ 35 ], and then reduce the photosynthetic characteristics and chlorophyll fluorescence parameters [ 36 ]. Antioxidant enzymes such as CAT, SOD, POD and APX either scavenge the toxic ROS or defend plants by activating a non-enzymatic antioxidant system [ 37 ]. In our previous research, the antioxidant enzyme activity in P. lactiflora leaves changed significantly under drought stress [ 8 ].…”

Section: Discussionmentioning

confidence: 99%

Analysis and Functional Verification of PlPM19L Gene Associated with Drought-Resistance in Paeonia lactiflora Pall.

Meng

Guo

et al. 2022

IJMS

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The herbaceous peony (Paeonia lactiflora Pall.) is widely cultivated as an ornamental, medicinal and edible plant in China. Drought stress can seriously affect the growth of herbaceous peony and reduce its quality. In our previous research, a significantly differentially expressed gene, PM19L, was obtained in herbaceous peony under drought stress based on transcriptome analysis, but little is known about its function. In this study, the first PM19L that was isolated in herbaceous peony was comprised of 910 bp, and was designated as PlPM19L (OP480984). It had a complete open reading frame of 537 bp and encoded a 178-amino acid protein with a molecular weight of 18.95 kDa, which was located in the membrane. When PlPM19L was transferred into tobacco, the transgenic plants had enhanced tolerance to drought stress, potentially due to the increase in the abscisic acid (ABA) content and the reduction in the level of hydrogen peroxide (H2O2). In addition, the enhanced ability to scavenge H2O2 under drought stress led to improvements in the enzyme activity and the potential photosynthetic capacity. These results combined suggest that PlPM19L is a key factor to conferring drought stress tolerance in herbaceous peony and provide a scientific theoretical basis for the following improvement in the drought resistance of herbaceous peony and other plants through genetic engineering technology.

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