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Int J Mol Sci. 2014 Mar 21;15(3):5063-78. doi: 10.3390/ijms15035063.

A chrysanthemum heat shock protein confers tolerance to abiotic stress.

Author information

1
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. aiping_song@aliyun.com.
2
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. zhuxirong88@126.com.
3
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chenfd@njau.edu.cn.
4
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. gaohs2002@163.com.
5
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. jiangjiafu@njau.edu.cn.
6
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chensm@njau.edu.cn.

Abstract

Heat shock proteins are associated with protection against various abiotic stresses. Here, the isolation of a chrysanthemum cDNA belonging to the HSP70 family is reported. The cDNA, designated CgHSP70, encodes a 647-residue polypeptide, of estimated molecular mass 70.90 kDa and pI 5.12. A sub-cellular localization assay indicated that the cDNA product is deposited in the cytoplasm and nucleus. The performance of Arabidopsis thaliana plants constitutively expressing CgHSP70 demonstrated that the gene enhances tolerance to heat, drought and salinity. When CgHSP70 was stably over-expressed in chrysanthemum, the plants showed an increased peroxidase (POD) activity, higher proline content and inhibited malondialdehyde (MDA) content. After heat stress, drought or salinity the transgenic plants were better able to recover, demonstrating CgHSP70 positive effect.

PMID:
24663057
PMCID:
PMC3975440
DOI:
10.3390/ijms15035063
[Indexed for MEDLINE]
Free PMC Article
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