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Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (36): 80-86.doi: 10.11924/j.issn.1000-6850.casb2021-0055

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Changes of Phytohormone and Structure in Xylem During Adventitious Root Production from the Stem of Parthenocissus tricuspidata Planch on the Rock Wall

ZHAO Shuang(), WANG Huan, BU Xiaoying, DONG Aiwen()   

  1. Forest Products Chemical Engineering Key Laboratory of Hunan Province, Jishou University, Zhangjiajie, Hunan 427000
  • Received:2021-01-18 Revised:2021-05-27 Online:2021-12-25 Published:2022-02-15
  • Contact: DONG Aiwen E-mail:850488339@qq.com;daw1999@163.com

Abstract:

To explore the spontaneously produced adventitious roots in the woody stems of Parthenocissus tricuspidata Planch on the rock wall, three kinds of stems were used as test materials. The hormone content in the xylem of the stem and the hormone level during the formation and development of adventitious root primordium induced by exogenous hormone were detected by enzyme-linked immunosorbent assay (Elisa). The results showed that the adventitious root primordium in the stem of annual Parthenocissus tricuspidata Planch belonged to internal origin. In the xylem of each test wood, the highest auxin (IAA) was 11.486 μg/g and the lowest was 6.255 μg/g counted on fresh weight. The highest of cytokinin (CTK) was 232.295 ng/g and the lowest was 150.235 ng/g counted on fresh weight, but the highest CTK was 232.295 ng/g when the adventitious root primordium was produced in the stem of 1-year-old Parthenocissus tricuspidata Planch treated with the exogenous hormone. The content of jasmonic acid (JA) was much lower than the 10-100 ng/g range of plant vegetative organs according to fresh weight, but the concentration in the rooting stem was much higher than that in the non-rooting stem. However, the content of methyl jasmonate (Me-JA) in the xylem of each test wood was very low, but the concentration in the rooting stem was much higher than that in the non-rooting stem. The IAA/CTK in the xylem of Rhizoma Parthenocissus tricuspidata Planch reached 27-76, and the concentration of hormone in the xylem of the rooting stem was much higher than that of the non-rooting stem, and the hormone concentration increased significantly when the stem produced adventitious root, which indicated that the spontaneous production of the stem adventitious root required the synergistic action of many kinds of endogenous hormones.

Key words: Parthenocissus tricuspidata Planch, woody growth stems, adventitious root primordia, endogenous hormones

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