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中国农学通报 ›› 2024, Vol. 40 ›› Issue (2): 25-33.doi: 10.11924/j.issn.1000-6850.casb2023-0082

• 林学·园艺·园林 • 上一篇    下一篇

不同植物生长调节剂对茶叶低温胁迫的光合特性研究

肖黄巧1(), 周红灿1,2,3, 揭雨成1,3()   

  1. 1 湖南农业大学苎麻研究所,长沙 410128
    2 怀化学院美术与设计艺术学院,湖南怀化 418000
    3 湖南省草类作物种质创新与利用工程技术研究中心,长沙 410128
  • 收稿日期:2023-01-31 修回日期:2023-04-19 出版日期:2024-01-10 发布日期:2024-01-10
  • 通讯作者:
    揭雨成,男,1966年出生,湖南常德人,教授,博士生导师,研究方向:作物种质创新与逆境生物学研究。通信地址:410128 湖南省长沙市芙蓉区农大路1号 湖南农业大学,E-mail:
  • 作者简介:

    肖黄巧,女,1999年出生,湖南洞口人,硕士在读,研究方向:逆境生物学研究。通信地址:410128 湖南省长沙市芙蓉区农大路1号 湖南农业大学,E-mail:

  • 基金资助:
    国家重点研发计划“华中地区主要经济作物气象灾害防控技术研发与产品创制”(2019YFD1002205-3)

Effects of Different Plant Growth Regulators on Photosynthetic Characteristics of Tea at Low Temperature Stress

XIAO Huangqiao1(), ZHOU Hongcan1,2,3, JIE Yucheng1,3()   

  1. 1 Ramie Research Institute of Hunan Agricultural University, Changsha 410128
    2 Academy of Fine Arts and Design, Huaihua University, Huaihua, Hunan 418000
    3 Hunan Engineering Technology Center of Grass Crop Germplasm Innovation and Utilization, Changsha 410128
  • Received:2023-01-31 Revised:2023-04-19 Published-:2024-01-10 Online:2024-01-10

摘要:

为探究不同种类浓度的植物生长调节剂在低温条件下对茶叶光合特性的影响。本试验以‘桃源大叶’(TY)和‘储叶齐’(CY)为试验材料,探讨在低温条件下喷施不同植物生长调节剂对茶树光响应曲线、叶片净光合速率(Pn)、气孔导度(Gs)、细胞间CO2浓度(Ci)、蒸腾速率(Tr)、饱和蒸汽压(VpdL)、叶片瞬间水分利用率(WUE)、气孔限制值(LS)的影响。试验结果表明:5种生长调节剂对‘桃源大叶’和‘储叶齐’的抗寒能力均有不同程度的提高,其中TY处理组在低温下喷施植物生长调节剂对茶叶的影响排名依次为C2>D3>D1>C3>E2>A1>E1>B2>B1>C1>A2>D2>B3>A3>E3>CK,其中C2、D3的综合排名最高,分别是0.875和0.833,3个主成分的累计贡献率为93.931%;而CY处理组在低温下喷施植物生长调节剂对茶叶的影响排名依次为C2>A2>D1>B2>B1>E3>A1>B3>D2>C3>C1>E1>E2>D3>A3>CK,其中C2、A2的综合排名较高,分别是0.753和0.713,3个主成分的累计贡献率为89.108%。在低温下喷施调节剂可以提高PnGsCiTr,降低LS,为提高茶叶的抗寒性奠定了基础。

关键词: ‘桃源大叶’, ‘储叶齐’, 生长调节剂, 低温胁迫, 光合特性

Abstract:

To investigate the effects of different concentrations of plant growth regulators on the photosynthetic characteristics of tea under low temperature conditions, ‘Taoyuan Big Leaf’ (TY) and ‘Storage Leaf Qi’ (CY) were used as experimental materials to explore the effects of spraying different plant growth regulators under low temperature conditions on the light response curve, leaf net photosynthetic rate (Pn), stomatal conductance (Gs), intercellular CO2 concentration (Ci), transpiration rate (Tr), saturated vapor pressure (VpdL), leaf instantaneous water use efficiency (WUE), and stomatal limit value (LS) of tea trees. The experimental results showed that the five growth regulators improved the cold resistance of ‘Taoyuan Big Leaf’ and 'Storage Leaf Qi' to varying degrees. Among them, the TY treatment group had the effects ranking of C2>D3>D1>C3>E2>A1>E1>B2>B1>C1>A2>D2>B3>A3>E3>CK when spraying plant growth regulators on tea at low temperatures, and C2 and D3 had the highest comprehensive ranking, with 0.875 and 0.833 respectively, the cumulative contribution rate of the three principal components is 93.931%. The ranking of the effects of spraying plant growth regulators on tea in the CY treatment group at low temperatures was C2>A2>D1>B2>B1>E3>A1>B3>D2>C3>C1>E1>E2>D3>A3>CK, and C2 and A2 were ranking higher, with 0.753 and 0.713 respectively, and the cumulative contribution rate of the three principal components is 89.108%. Spraying regulators at low temperatures can increase Pn, Gs, Ci, Tr, and reduce LS, laying the foundation for improving the cold resistance of tea.

Key words: ‘Taoyuan Big Leaf’, ‘Storage leaf Qi’, growth regulator, low temperature stress, photosynthetic characteristics