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[1]付 忠 谢世清 徐文果 岩 所 陈军文*.3种光强环境下白魔芋生长旺盛期的光合和叶绿素a荧光特征[J].应用与环境生物学报,2016,22(03):446-454.[doi:10.3724/SP.J.1145.2015.10013]
 FU Zhong,XIE Shiqing,XU Wenguo,et al.Characteristics of photosynthesis and chlorophyll a fluorescence in Amorphophallus albus during vigorous growth under different light intensity*[J].Chinese Journal of Applied & Environmental Biology,2016,22(03):446-454.[doi:10.3724/SP.J.1145.2015.10013]
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3种光强环境下白魔芋生长旺盛期的光合和叶绿素a荧光特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
22卷
期数:
2016年03期
页码:
446-454
栏目:
研究论文
出版日期:
2016-06-25

文章信息/Info

Title:
Characteristics of photosynthesis and chlorophyll a fluorescence in Amorphophallus albus during vigorous growth under different light intensity*
作者:
付 忠123 谢世清12 徐文果4 岩 所4 陈军文123*
1云南农业大学/云南省优势中药材规范化种植工程研究中心 昆明 650201 2云南农业大学魔芋研究所 昆明 650201 3云南农业大学农学与生物技术学院 昆明 650201 4德宏州农业技术推广中心 芒市 678400
Author(s):
FU Zhong123 XIE Shiqing12 XU Wenguo4 YAN Suo4 & CHEN Junwen123**
1Yunnan Research Center on Good Agricultural Practice for Dominant Chinese Medicinal Materials, Yunnan Agriculture University, Kunming 650201, China 2Institute of Konjac, Yunnan Agriculture University, Kunming 650201, China 3College of Agronomy and Biotechnology, Yunnan Agriculture University, Kunming 650201, China 4Extension Center of Agricultural Technology of Dehong Prefecture, Mangshi, Yunnan 678400, China
关键词:
光照强度白魔芋光合特征叶绿素荧光
Keywords:
The objective of the present study was to investigate the adaptive mechanism of Amorphophallus albus to different light intensities during the of vigorous growth period. The parameters of photosynthetic gas exchange and chlorophyll a fluorescence were ana
分类号:
S632.301 : Q945.79
DOI:
10.3724/SP.J.1145.2015.10013
摘要:
为了解生长旺盛期的白魔芋(Amorphophallus albus)对不同光强环境的适应机制,通过模拟白魔芋在农业生产中常见的3种生长光环境(高光、中光、低光),研究叶片气体交换和叶绿素a荧光参数的变化. 结果显示:随着生长环境光强的减小,白魔芋的暗呼吸速率和表观量子产额显著增大(P < 0.05),且在低光下最大净光合速率(Amax)、水分利用效率和羧化效率具有最大值,光补偿点和CO2补偿点在高光条件具有最大值;高光生长环境下白魔芋对光合诱导反应更迅速,且随着初始气孔导度(Gs-initial)的增大,达到最大净光合速率30%、50%和90%所需的时间逐渐降低. 低光生长环境下白魔芋的光系统II(PSⅡ)光下最大光化学效率(Fv′/Fm′)、实际光化学效率(ΔF/Fm′)、非光化学淬灭(NPQ)和电子传递速率(ETR)具有最大值;高光生长环境下白魔芋将更多光能分配到非光化学途径(ΦNPQ),而中、低光生长环境下光化学途径(ΦPSⅡ)比例较高. 综上表明,处于生长旺盛期的白魔芋在中、低光生长环境下有着较高的光合效率,并通过增加热耗散增强光保护能力;高光生长环境下白魔芋具有较快的光合诱导速率,同时通过增强PSⅡ抑制状态的转换能力等策略来适应高光,从而避免光合机构不可逆的损伤. (图8 表2 参45)
Abstract:
The objective of the present study was to investigate the adaptive mechanism of Amorphophallus albus to different light intensities during the of vigorous growth period. The parameters of photosynthetic gas exchange and chlorophyll a fluorescence were analyzed in A. albus grown under three light intensities (high, moderate and low light) usually received by A. albus in agricultural production. The results showed significant increases in dark respiration rate and apparent quantum yield with the decrease of light intensity (P < 0.05). The maximums of photosynthetic rate (Amax), intrinsic water use efficiency and carboxylation efficiency were found in individuals growing under low light, while the maximums of light compensation point and CO2 compensation point were recorded in those under high light. The response to simulated sunfleck was quicker in individuals grown under high light; the time to reach 30%, 50% and 90% of Amax decreased with increased initial stomatal conductance (Gs-initial) during the process of photosynthetic induction. Maximum photochemical efficiency of PSII in the light (Fv′/Fm′), actual photochemical efficiency of PSII in the light (ΔF/Fm′), non-photochemical quenching (NPQ) and electron transport rate (ETR) were found to be higher in individuals grown under low light; higher proportion of light energy were partitioned to non-photochemical quenching (ФNPQ) in individuals grown under high light, however, higher proportion were allocated to photochemical quenching (ΦPSⅡ) in individuals grown under moderate and low light. The results suggest that A. albus grown under moderate or low light would possess higher photosynthetic capacity and display enhanced photoprotection by increasing the capacity of heat dissipation. Correspondingly, high-light-grown A. albus has a fast response to sunfleck, and enhanced transition of PSII inhibition state to avoid irreversible photodamage to photosynthetic apparatus.

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更新日期/Last Update: 2016-06-25