Muestra métricas de impacto externas asociadas a la publicación. Para mayor detalle:
Indexado |
|
||||||
DOI | 10.2225/VOL14-ISSUE3-FULLTEXT-5 | ||||||
Año | 2011 | ||||||
Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
The changes of cell ultra structure as well as Ca2+ homeostasis involved in the drought-induced maize leaf senescence was investigated. Meanwhile, many indicatives of leaf senescence including thiobarbituric acid reactive substance (MDA), electrolyte leakage (EL), and chlorophyll along with soluble proteins were also detected during the process. The Polyethylene glycol6000(PEG6000)-incubated detached leaves showed a slight increase in the MDA content and electrolyte leakage during the first 30 min of our detection, which was corresponded to an unobvious alteration of the cell ultrastructure. Other typical senescence parameters measured in whole leaf exhibited a moderate elevation as well. Thereafter, however, the EL and MDA rose to a large extent, which was correlated with a dramatic damage to the cell ultrastructure with concomitant sharp decrease in the chlorophyll and soluble proteins content. The deposits of calcium antimonite, being an indicator for Ca2+ localization, were observed in the vacuoles as well as intercellular spaces in the leaves grown under normal condition. Nevertheless, after PEG treatment, it was revealed a distinct increment of Ca2+ in the cytoplasm as well as chloroplasts and nuclei. Moreover, with long-lasting treatment of PEG to the detached leaves, the concentration of Ca2+ as described above showed a continuous increment which was consist with the remarked alteration of physiological parameters and severe damage to the ultrastructure of cells, all of which indicated the leaf senescence. Such drought-induced leaf senescence might result from a loss of the cell's capability to extrude Ca2+. All above findings give us a good insight into the important role of Ca2+ homeostasis in the process of leaf senescence accelerated by the drought stress.
Ord. | Autor | Género | Institución - País |
---|---|---|---|
1 | Ma, Yuan Yuan | - |
Hebei Acad Agr & Forestry Sci - China
Shijiazhuang Univ - China Hebei Academy of Agricultural and Forestry Sciences - China Shijiazhuang University - China |
2 | Guo, Xiu Lin | - |
Hebei Acad Agr & Forestry Sci - China
Hebei Academy of Agricultural and Forestry Sciences - China |
3 | Liu, Bin Hui | - |
Hebei Acad Agr & Forestry Sci - China
Hebei Academy of Agricultural and Forestry Sciences - China Hebei Academy of Agriculture and Forestry Sciences - China |
4 | Liu, Zi Hui | - |
Hebei Acad Agr & Forestry Sci - China
Hebei Academy of Agricultural and Forestry Sciences - China |
5 | Shao, Hong Bo | - |
CASSACA - China
Qingdao Univ Sci & Technol - China Chinese Academy of Sciences - China Qingdao University of Science & Technology - China Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences - China Qingdao University of Science and Technology - China |
Fuente |
---|
National Natural Science Foundation of China |
Natural Science Foundation of Hebei Province, China |
National Science & Technology Supporting Project, China |
The Science & Technology Development Plan of Shandong Province |
One Hundred-Talent Plan of Chinese Academy of Sciences |
CAS/SAFEA International Partnership Program for Creative Research Teams, the Important Direction Project of CAS |
CAS Young Scientists Fellowship |
Chinese Academy of Sciences (CAS) |
CAS/SAFEA International Partnership Program for Creative Research Teams |
Science & Technology Development Plan of Shandong Province |
Agradecimiento |
---|
This work was jointly supported by the Natural Science Foundation of Hebei Province, China (C2007000994), the National Science & Technology Supporting Project, China (2007BAD69B01), the National Natural Science Foundation of China (41001137), The Science & Technology Development Plan of Shandong Province (2010GSF10208), One Hundred-Talent Plan of Chinese Academy of Sciences (CAS), the CAS/SAFEA International Partnership Program for Creative Research Teams, the Important Direction Project of CAS (KZCX2-YW-JC203) and CAS Young Scientists Fellowship (2009Y2B211). |