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Oxygen radicals and cytoplasm zoning in growing lily pollen tubesстатья Исследовательская статья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 8 декабря 2021 г.
- Авторы: Podolyan Alexandra, Luneva Oksana, Klimenko Ekaterina, Breygina Maria
- Журнал: Plant Reproduction
- Том: 34
- Номер: 2
- Год издания: 2021
- Издательство: Springer Verlag
- Местоположение издательства: Germany
- Первая страница: 103
- Последняя страница: 115
- DOI: 10.1007/s00497-021-00403-6
- Аннотация: Recently, redox-regulation of tip growth has been extensively studied, but differential sensitivity of growing cells to particular ROS and their subcellular localization is still unclear. Here, we used specific dyes to provide mapping of H2O2 and O·2¯ in short and long pollen tubes. We found apical accumulation of H2O2 and H2O2-producing organelles in the shank that were not colocalized with O·2¯-producing mitochondria. Differential modulation of ROS content of the germination medium affected both growth speed and pollen tube morphology. Oxygen radicals affected ionic zoning: membrane potential and pH gradients. OH· caused depolarization all along the tube while O·2¯ provoked hyperpolarization and cytoplasm alkalinization. O·2¯accelerated growth and reduced tube diameter, indicating that this ROS can be considered as pollen tube growth stimulator. Serious structural disturbances were observed upon exposure to OH· and ROS quencher MnTMPP: pollen tube growth slowed down and ballooned tips formed in both cases, but OH· affected membrane transport and organelle distribution as well. OH·, thus, can be considered as a negative regulator of pollen tube growth. Pollen tubes, in turn, are able to reduce OH· concentration, which was assessed by electron paramagnetic resonance spectroscopy (EPR).
- Добавил в систему: Брейгина Мария Александровна
Прикрепленные файлы
| № | Имя | Описание | Имя файла | Размер | Добавлен |
|---|---|---|---|---|---|
| 1. | Полный текст | Podolyan2021_Article_OxygenRadicalsAndCytoplasmZoni.pdf | 2,7 МБ | 1 февраля 2021 [Breygina_Maria] |