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The Functional State of the Photosynthetic Apparatus of Potato Plants upon Destruction of the Tubulin Cytoskeleton
Biophysics Pub Date : 2020-09-01 , DOI: 10.1134/s0006350920050103
I. Yu. Makeeva , T. I. Puzina

We have investigated the effect of colchicine, a disrupting agent of the tubulin cytoskeleton, on chlorophyll fluorescence parameters, the Hill reaction, noncyclic photophosphorylation, and the lipid peroxidation reaction in Solanum tuberosum grown in soil in a greenhouse environment. The destruction of microtubules caused an increase in the content of lipid fatty acid hydroperoxides, the primary product of lipid peroxidation, and led to changes in fluorescence parameters: F0 increased, Fm and the maximum quantum efficiency of PSII (Fv/Fm) decreased, and the dissipation of electronic excitation energy as heat increased. Simultaneously, it was found that the Hill reaction rate and the intensity of the process of noncyclic photophosphorylation decreased. The results obtained in this work are discussed in view of the destruction of the integrity of the chloroplast membrane and changes in chlorophyll fluorescence parameters due to colchicine application, as well as in light of our previously obtained data on the change in the content of phytohormones and their concentration ratios in potato leaves when microtubules are destroyed.

中文翻译:

微管蛋白细胞骨架破坏后马铃薯植物光合装置的功能状态

我们研究了秋水仙碱(一种微管蛋白细胞骨架的破坏剂)对温室环境中土壤中生长的马铃薯的叶绿素荧光参数、希尔反应、非循环光磷酸化和脂质过氧化反应的影响。微管的破坏导致脂质过氧化的主要产物脂质脂肪酸氢过氧化物含量增加,并导致荧光参数发生变化:F0 增加,Fm 和 PSII 的最大量子效率(Fv/Fm)降低,以及随着热量的增加电子激发能的耗散。同时发现Hill反应速率和非环状光磷酸化过程的强度降低。
更新日期:2020-09-01
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