Hypoxia-induced programmed cell death in root-tip meristematic cells of Triticum aestivum L.

• Autorzy: Pang N. , Zhang F.
• Języki publikacji: EN

Abstrakty

EN

In this study, wheat (Triticum aestivum L.) roots were treated with hypoxic water. The staining of cell preparations with DAPI revealed morphological changes of the cells such as nuclear condensation, deformation and fragmentation. Under TEM, cellular membrane shrinkage and breakage, chromatin condensation and apoptotic- like bodies were displayed. The number of mitochondria increased dramatically; their cristae were damaged; the interior became a cavitation and only some flocculent materials were distributed. Indirect immunofluorescence staining indicated that cytochrome C diffused from mitochondria to nucleoplasm and cytoplasm. TUNEL positive nuclei indicated double strand breaks of DNA. DAB staining was used for the identification of hydrogen peroxide and examination showed that the longer the treating time, the darker the staining of the meristematic zones of the roots which suggested the increased accumulation of these Reactive Oxygen Species (ROS). The elevation of hydrogen peroxide production was paralleled with the increase of SOD and POD activities. A negative correlation between the exposure time under hypoxia and the contents of soluble proteins was found. No obvious effect of hypoxia on MDA was established. The obtained results demonstrate that hypoxia causes programmed cell death in the root-tip meristematic cells of Triticum aestivum L. which is most probably attributed to the accumulation of large amounts of ROS.

• Wydawca: -
• Czasopismo: Acta Biologica Cracoviensia. Series Botanica
• Rocznik: 2015
• Tom: 57
• Numer: 1
• Opis fizyczny: p.51-61,fig.,ref.

Twórcy

autor

Pang N.

• College of Life Sciences, Capital Normal University, No.105, Xi San Huan Bei Lu, Beijing 100048, China

autor

Zhang F.

• College of Life Sciences, Capital Normal University, No.105, Xi San Huan Bei Lu, Beijing 100048, China

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Identyfikatory

DOI

10.1515/abcsb-2015-0004