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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (8): 48-53.doi: 10.11924/j.issn.1000-6850.casb2020-0640

所属专题： 生物技术

• 林学·园艺·园林 • 上一篇    下一篇

三角梅自然越冬过程的生理生化响应

马晓华(), 胡青荻, 郑坚, 张旭乐, 刘洪见, 钱仁卷()   

  1. 浙江省亚热带作物研究所,浙江温州 325005
  • 收稿日期:2020-11-10 修回日期:2021-01-04 出版日期:2021-03-15 发布日期:2021-03-16
  • 通讯作者: 钱仁卷
  • 作者简介:马晓华,女,河北秦皇岛人,助理研究员,主要从事园林植物生理生化与育种研究。通信地址：325005 浙江省温州市雪山路334号, E-mail： maxiaohua1120@126.com。
  • 基金资助:
    浙江省农业(林木)新品种选育重大科技专项“三角梅高抗资源收集筛选及新种质创制”(2016C02056-13-6);温州市农业新品种选育协作组项目“三角梅种质资源收集及新品种选育”(2019ZX004-1)

Physiological and Biochemical Responses of Bougainvillea Overwintering

Ma Xiaohua(), Hu Qingdi, Zheng Jian, Zhang Xule, Liu Hongjian, Qian Renjuan()   

  1. Institute of Subtropical Crops of Zhejiang Province, Wenzhou Zhejiang 325005
  • Received:2020-11-10 Revised:2021-01-04 Online:2021-03-15 Published:2021-03-16
  • Contact: Qian Renjuan

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摘要：

为研究不同品种三角梅的低温适应能力,以2年生健康成熟的‘巴西紫’、‘花叶大红’、‘绿樱’、‘云南紫’、‘珍珠白’、‘柠檬黄’和‘中国红’7种三角梅为试验材料,测定其在自然越冬过程中的丙二醛(MDA)、脯氨酸、可溶性蛋白和过氧化氢(H2O2)含量,超氧自由基(O2·-)产生速率及超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)的活性。结果表明,不同品种三角梅的MDA、脯氨酸、可溶性蛋白和H2O2含量在自然越冬期间的变化趋势显著不同,‘柠檬黄’的脯氨酸含量随着温度降低而逐渐降低;‘绿樱’和‘巴西紫’随着自然温度变化出现先降低后升高。‘巴西紫’、‘花叶大红’、‘绿樱’和‘云南紫’的H2O2含量在越冬期间均随着温度降低先升高后降低再升高然后又降低。‘云南紫’的POD活性先升高后降低;而‘中国红’的POD活性则表现为随着温度的降低而逐渐降低。因此,不同的三角梅品种间的低温适应力存在极大差异,‘中国红’、‘巴西紫’和‘柠檬黄’表现了较强的低温适应能力;‘绿樱’、‘云南紫’低温抵抗能力稍弱,但也正常完成越冬;而‘花叶大红’和‘珍珠白’则需要通过落叶来适应越冬期间的低温环境。

关键词: 三角梅, 越冬, 低温, 可溶性蛋白, 抗氧化酶

Abstract:

To study the adaptability of different Bougainvillea varieties under low temperature, 7 kinds of healthy and mature Bougainvillea plants ‘Brazil Purple’, ‘Mosaic Red’, ‘Green Cherry’, ‘Yunnan Purple’, ‘Pearl White’, ‘Lemon Yellow’ and ‘Chinese Red’ of two-year-old were used as the experimental materials to determine the content of malondialdehyde (MDA), proline, soluble protein and hydrogen peroxide (H2O2) and the generation rate of superoxide radicals (O2 ·-) and the activities of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) during the natural overwintering process. The results showed that the content of MDA, proline, soluble protein and H2O2 of different Bougainvillea varieties had significantly different variation trends during the natural overwintering period. The proline content of ‘Lemon Yellow’ showed a gradual decrease with the decrease of temperature; that of ‘Green Cherry’ and ‘Brazil Purple’ decreased first and then increased with the decline of natural temperature. The H2O2 content of ‘Brazil Purple’, ‘Mosaic Red’, ‘Green Cherry’ and ‘Yunnan Purple’ all had an increase-decrease-increase-decrease trend as the temperature decreased during the winter. The POD activity of ‘Yunnan Purple’ first increased and then decreased; while the POD activity of ‘Chinese Red’ showed a gradual decrease as the temperature decreased. Therefore, the low temperature adaptability of different Bougainvillea varieties is indeed very different, ‘Chinese Red’, ‘Brazil Purple’ and ‘Lemon Yellow’ show a strong low temperature adaptability; ‘Green Cherry’ and ‘Yunnan Purple’ have a weak low-temperature resistance, but they could survive safely overwintering, while ‘Mosaic Red’ and ‘Pearl White’ need to have leaf fall to adapt to the low temperature environment during the winter.

Key words: Bougainvillea, overwintering, low temperature, soluble protein, antioxidant enzymes

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