浙江农业学报 ›› 2017, Vol. 29 ›› Issue (9): 1506-1514.DOI: 10.3969/j.issn.1004-1524.2017.09.12

• 园艺科学 • 上一篇    下一篇

不同黄化程度对杂柑幼苗生长及光合作用的影响

熊博1, 严巧巧2, 孙国超1, 邱霞1, 叶霜1, 廖玲1, 罗近予1, 代琳1, 汪志辉1, *   

  1. 1.四川农业大学 园艺学院,四川 成都 611130;
    2.四川工程职业技术学院,四川 德阳 618000
  • 收稿日期:2017-03-20 出版日期:2017-09-20 发布日期:2017-09-27
  • 通讯作者: 汪志辉,E-mail:wangzhihui318@126.com
  • 作者简介:熊博(1988—),男,四川达州人,硕士研究生,主要从事果树栽培理论与技术研究。E-mail:xiongbo200977@163.com
  • 基金资助:
    四川省科技厅项目(2016NZ0056); 四川省教育厅项目(14CZ0002)

Effect of different degrees of etiolation on growth and photosynthesis of hybrid citrus

XIONG Bo1, YAN Qiaoqiao2, SUN Guochao1, QIU Xia1, YE Shuang1, LIAO Ling1, LUO Jinyu1, DAI Lin1, WANG Zhihui1, *   

  1. 1. College of Horticulture, Sichuan Agricultural University, Chengdu 611130, China;
    2. Sichuan Engineering Technical College, Deyang 618000, China
  • Received:2017-03-20 Online:2017-09-20 Published:2017-09-27

摘要: 为了研究不同黄化程度对柑橘幼苗生长及光合作用的影响,以黄果柑、不知火幼苗为材料,分析黄化苗、花叶苗和绿叶苗的生长量、叶绿素含量、光合及叶绿素荧光参数的变化。结果表明,叶片黄化抑制了幼苗的正常生长,黄化苗的生长量显著低于绿叶苗;黄化苗叶片中游离脯氨酸(Pro)、丙二醛(MDA)、可溶性糖(SS)和可溶性蛋白质(SP)含量均显著增加;叶片黄化显著降低了叶片叶绿素a(Chl a)、叶绿素b(Chl b)、类胡萝卜素(Car)含量和光合作用气体交换参数(气孔导度、胞间CO2浓度、蒸腾速率),改变了叶绿素的组成比例。黄化苗的PSⅡ最大光化学效率(Fv/Fm)、光化学猝灭系数(qP)和非光化学猝灭系数(NPQ)显著低于绿叶苗,导致净光合速率(Pn)显著降低,但花叶苗Fv/Fm下降程度较小。研究表明,叶片黄化抑制了黄果柑、不知火幼苗的正常生长,降低了光合能力。

关键词: 黄果柑, 不知火, 黄化, 幼苗, 光合作用

Abstract: In order to study the effect of different etiolation degrees on Citrus seedling growth and photosynthesis, Citrus cultivars Huangguogan and Shiranuhi seedlings were used as the materials, to analyze the changes of seedling biomass, chlorophyll content, photosynthetic parameters and chlorophyll fluorescence characteristics of etiolated, multicoloured and green seedlings. The results showed that the normal growth of Citrus cultivars Huangguogan and Shiranuhi seedlings was inhibited by etiolation, and the growth of etiolated seedlings was significantly lower than that of green seedlings. The contents of free proline (Pro), malondialdehyde (MDA), soluble sugar (SS) and soluble protein (SP) were significantly increased in the leaves of etiolated seedlings. Seedling etiolation could significantly reduce the content of chlorophyll a, chlorophyll b, carotenoid and photosynthetic gas exchange parameters (stomatal conductance, intercellular CO2 concentration, transpiration rate), and change the composition ratio of the chlorophyll. Maximal photochemical efficiency (Fv/Fm), photochemical quenching (qP), and non-photochemical quenching (NPQ) of etiolated seedlings were significantly lower than those of green seedlings, but the Fv/Fm of multicoloured seedlings was decreased slightly. This study indicated that seedling etiolation inhibited the normal growth and photosynthetic capacity of Citrus seedlings.

Key words: Huangguogan, Shiranuhi, etiolation, seedlings, photosynthesis

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