Involvement of nitric oxide in the response of plantcells microtubules to the action of high temperature

Plokhovska, SH
Yemets, АI
1Blume, Ya.B
1Institute of Food Biotechnology and Genomics of the NAS of Ukraine, Kyiv
Dopov. Nac. akad. nauk Ukr. 2020, 8:66-72
Section: Biology
Language: Ukrainian

The effect of a donor (sodium nitroprusside, SNP) and a scavenger (carboxy-2-phenyl-4,4,5,5-tetramethylimidazoline- 1-oxyl-3-oxide, cPTIO) nitric oxide (NO) on the heat resistance of Arabidopsis thaliana seedlings with the participation of microtubules as an important intermediator in the realization of the action of high temperatures on the plant cell is studied. The exposure of seedlings at a temperature of 41 °C led to significant changes in the initial organization of microtubules, which manifested themselves in their depolymerization and fragmentation. It has been shown that the use of the SNP nitric oxide donor under thermal stress, which should cause an increase in the level of endogenous NO, helps to maintain the microtubule structural integrity to a high temperature, while the use of cPTIO nitric oxide scavenger causes the opposite effects. The established patterns of changes in the organization of microtubules can be considered as an important element of intracellular mechanisms of inhibition of the growth of roots under the influence of a high temperature and the recovery of these processes by induction of intracellular signaling pathways with NO.

Keywords: cPTIO, donor NO, heat stress, microtubules, nitric oxide (NO), scavenger NO, sodium nitroprusside

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