Morpho-physiological and micrographic characterization of maize hybrids under NaCl and Cd stress

被引:43
|
作者
Abbasi, Ghulam Hasan [1 ]
Akhtar, Javaid [2 ]
Anwar-ul-Haq, Muhammad [2 ]
Malik, Waqas [3 ]
Ali, Shafaqat [4 ]
Chen, Zhong-Hua [5 ]
Zhang, Guoping [6 ]
机构
[1] Islamia Univ Bahawalpur, Univ Coll Agr & Environm Sci, Dept Soil Sci, Bahawalpur, Pakistan
[2] Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad, Pakistan
[3] Bahauddin Zakariya Univ, Fac Agr Sci & Technol, Dept Plant Breeding & Genet, Multan, Pakistan
[4] Govt Coll Univ, Faisalabad, Pakistan
[5] Univ Western Sydney, Sch Nat Sci, Ctr Plants & Environm, Richmond, NSW 2753, Australia
[6] Zhejiang Univ, Coll Agr & Biotechnol, Dept Agron, Hangzhou 310003, Zhejiang, Peoples R China
关键词
Salinity; Cadmium; Photosynthesis; Gas exchange; Ultra structure; Chloroplast; PHOTOSYNTHETIC ACTIVITY; CADMIUM; WHEAT; ULTRASTRUCTURE; SALINITY; PROTEINS; ENZYMES; LEAVES;
D O I
10.1007/s10725-014-9936-6
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
A hydroponic experiment was conducted to investigate single and combined effects of 5 mu mol/L Cd and 100 mM NaCl on growth, root morphology, photosynthetic parameters, leaf and root ultra-structure of two maize hybrids (26204 and 8441) differing in salt tolerance. A more pronounced reduction on growth, root morphology, SPAD value, chlorophyll fluorescence and leaf gas exchange indicated that 8441 was more sensitive than 26204 to both Cd and NaCl stresses. Transmission electron microscopy of 8441 revealed a more severe destruction in root and leaf cells as compared to 26204. The reduction in growth and photosynthetic parameters were associated with severe disorganization of nucleus, chloroplast, mitochondrial damage, vacuolation, and increased number and size of pastoglobuli. Interestingly, the combined stress of both NaCl and Cd had obvious beneficial effect on the plant growth, photosynthetic parameters and cell ultra-structure relative to Cd or Na stress alone in the two maize hybrids. The study suggested that there is involvement of same genetic and physiological mechanisms in response to both Cd and NaCl stresses.
引用
收藏
页码:115 / 122
页数:8
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