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作物学报 ›› 2012, Vol. 38 ›› Issue (08): 1522-1528.doi: 10.3724/SP.J.1006.2012.01522

• 耕作栽培·生理生化 • 上一篇    下一篇

连作对太子参光合及药用品质的影响

曾令杰1,**，林茂兹2,**，李振方1,**，戴林泉1，李吉1，李晶晶1，张重义1，林文雄1,*   

  1. 1福建农林大学农业生态研究所, 福建福州350002; 3福建师范大学福清分校, 福建福清350300
  • 收稿日期:2012-01-15 修回日期:2012-04-20 出版日期:2012-08-12 网络出版日期:2012-06-04
  • 通讯作者: 林文雄, E-mail: wenxiong181@163.com, Tel: 0596-83737535
  • 基金资助:

    本研究由福建省自然科学基金资助项目(2008J0051)和国家自然科学基金资助项目(30772729)资助。

Effects of Continuous Cropping on Photosynthesis and Medicinal Quality of Pseudostellariae heterophylla

ZENG Ling-Jie1,**,LIN Mao-Zi 2,**,LI Zhen-Fang1,**,DAI Lin-Quan1, LI Ji1,LI Jing-Jing1,ZHANG Zhong-Yi1,LIN Wen-Xiong1,*   

  1. 1 Institute of Agroecology, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2 Fuqing Branch of Fujian Normal University, Fuqing 350300, China
  • Received:2012-01-15 Revised:2012-04-20 Published:2012-08-12 Published online:2012-06-04
  • Contact: 林文雄, E-mail: wenxiong181@163.com, Tel: 0596-83737535

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1690

被引次数

14

摘要： 在福建柘荣太子参规范化栽培生产基地，以柘参2号为材料，探讨连作对太子参光合生理、产量及药用品质的影响。结果表明，连作导致太子参产量极显著下降(P<0.01)，仅为稻参轮作的1/3，其多糖含量仅为轮作太子参的88.08%，人参皂苷Rb1为轮作太子参的44.33%；光合指标测定表明，连作太子参叶绿素相对含量(SPAD)极显著降低(P<0.01)，叶片净光合速率(Pn)显著(P<0.05)降低；荧光动力学指标分析发现，太子参连作后叶绿素初始荧光(Fo)下降不显著，但非光化学猝灭系数下降(NPQ)显著；显微结构观察发现，连作太子参叶片细胞密度降低约30%，根细胞密度降低约45%，细胞排列由致密变为疏松。由此推测，连作破坏了太子参光合系统中的保护机制，使天线色素吸收的热量既不能用于光合成也不能被耗散掉，而在叶部累积引起营养器官畸形化，导致光合作用紊乱、光合速率下降，最终影响根部形态建成，其中分根数减少和根重下降成为限制太子参产量和品质的重要因素之一。

关键词: 太子参, 连作障碍, 光合作用, 药用品质

Abstract: Monocropping is one of cultivation systems for many crops in production, especially for Pseudostellariae heterophylla, one of Chinese herbal medicinal plants. Continuous cropping will cause a series of problem. In the paper, we designed a continuous cropping of Pseudostellariae heterophylla and rotaton of Pseudostellariae heterophylla and rice to explore effects on photosynthetic physiology and medicinal quality of P. heterophylla. The results showed that compared to the rotation, the yield of continuous cropping of P. heterophylla was significantly (P<0.01) declined, only corresponding to one third of the rotation’s, polysaccharide content and ginseng saponins Rb1 of the tuberous root reduced by 88.08% and 44.33%, respectively. The dynamic measurement of FluorCam fluorescence indicated that Fo was not declined significantly (P>0.05), and NPQ decreased significantly (P<0.05). The relative chlorophyll content of leaf (SPAD) (P<0.01) and Pn (P<0.05) declined. The decreased cell density in leaf and root was observed with microscope. In conclusion, the photosynthetic system was damaged by continuous cropping, especially for the protection mechanism. The light energy absorbed by PSII antenna pigment cannot be used in photosynthesis or dissipated, but accumulated in the leaves, which causes disordered photosynthesis, declined photosynthetic rate and malformed organs. The pathologic, and finally affects the morphogenesis of root that may be an important faction in restricting the yield and quality of P. Heterophylla.

Key words: Pseudostellariae heterophylla, Continuous cropping problems, Photosynthesis, Medicinal quality

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