| 摘要: |
| 通过淹水胁迫实验, 定期测定石菖蒲(Acorus tatarinowii)植株叶片叶绿素、丙二醛含量, 并利用水下饱和脉冲荧光仪测定石菖蒲叶片叶绿素荧光参数, 研究淹水胁迫对石菖蒲叶绿素荧光特性的影响。实验结果显示：与对照相比, 半淹处理组植株叶绿素、初始荧光(F0)、最大光能转换效率(Fv/Fm)、光化学淬灭系数(qP)、相对光合电子传递速率(rETR)均高于对照, 分别为对照的108.1%、102.4%、110.2%、103.4%、103.5%; 全淹处理组植株丙二醛含量显著增加, 而其叶绿素、F0、Fv/Fm、qP、rETR均低于对照, 且叶绿素、Fv/Fm和qP显著降低, 分别为对照的92.2%、85.4%、87.4%。所以, 石菖蒲具有一定的抗淹能力, 半淹利于石菖蒲的光合作用, 但全淹显著抑制其光合作用。 |
| 关键词: 叶绿素荧光 淹水 胁迫 石菖蒲 |
| DOI：10.11693/hyhz20120817001 |
| 分类号: |
| 基金项目:重庆市自然科学基金资助项目, CSTC2011JJA1236 号; 重庆市教委资助项目, KJ121215 号。 |
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| RESPONSE OF ACORUS TATARINOWIIIN CHLOROPHYLL FLUORESCENCE TO FLOODING STRESS |
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ZHU Qi-Hong, XIA Hong-Xia, XIE Hai-Hang, LI Qiang, DING Wu-Quan
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Key Laboratory of Water Environment Restoration, Chongqing University of Arts and Sciences
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| Abstract: |
| We studied the effect of flooding stress on chlorophyll fluorescence responded by Acorus tatarinowiiin flooding stress experiments, in which three groups were set: un-submerged (the control), half-submerged (water level at half height of the plant), and overall-submerged (the plant was submerged entirely). Chlorophyll and malondialdehyde (MDA) contents were determined regularly, and chlorophyll fluorescence parameters were in situdetermined by a submersible pulse-amplitude modulated (PAM) fluorometer. Experimental results show that compared to the control, in the half-submerged group, MDA content increased obviously by 21%, and other parameters, i.e., chlorophyll, initial fluorescence (F0), maximum photochemical efficiency (Fv
/Fm), photochemical quenching coefficient (qP), and relative electron transport rate (rETR) increased by 8.1%, 2.4%, 10.2%, 3.4%, and 3.5%, respectively, while in the overall-submerged group, MDA content increased remarkably by 57%, and others were decreased by 7.7%, 6.4%, 14.8%, 12.8%, and 4.1%, respectively. Therefore, Acorus tatarinowiihas the tolerance against flooding stress, and half-submergence is good for its photosynthesis, but overall submergence would significantly inhibits the photosynthesis. |
| Key words: chlorophyll fluorescence flooding stress Acorus tatarinowii. |
