Responses to cadmium stress in two tomato genotypes differing in heavy metal accumulation

Shouping ZHAO; Yongzhi ZHANG; Xuezhu YE; Qi ZHANG; Wendan XIAO

Article Details

Responses to cadmium stress in two tomato genotypes differing in heavy metal accumulation

Authors:

Shouping ZHAO | Yongzhi ZHANG | Xuezhu YE | Qi ZHANG | Wendan XIAO

Publisher:

TUBITAK

Journal:

Turkish Journal of Botany 2015 Vol.39 Issue 4, pp.615-624

Document Type:

Article

Publication Date:

8/2015

Document Language:

Turkish

Document ID (Org No.):

2000815737

Frequency:

Bimonthly

eISSN:

1303-6106

pISSN:

1300-008X

Keywords:

Abstract:

 

Our previous research defined two tomato (Solanum lycopersicum) genotypes: high cadmium (Cd) accumulator YSL189 and low Cd accumulator HZ903. Further hydroponics experiments investigated the different tolerance mechanisms to Cd stress between YSL189 and HZ903 at the seedling stage. When Cd concentration was >20 µM in the growing medium, the uptake rate of Cd was significantly higher in roots of YSL189 than it was in roots of HZ903. When plants were supplied with 50 and 100 µM Cd in the growing medium, there were higher Cd concentration, higher biomass and plant height, shorter roots, and higher expression levels of transporter genes natural resistance associated macrophage proteins (Nramp)2, Nramp3, and zinc and iron regulated transporter (ZIP) in roots of YSL 189 compared to HZ903. We infer that the high Cd accumulation in YSL189 was partly due to the higher Cd uptake rate and higher expression levels of Nramp2, Nramp3, and ZIP in its roots. At the same time, the degree of cell injury indicated by thiobarbituric acid reactive substance showed no significant differences in roots and stems between the two genotypes. We attribute this to the higher activities of superoxide dismutase, peroxidase, and catalase in roots and stems of YSL189 compared to HZ903.

 

Our previous research defined two tomato (Solanum lycopersicum) genotypes: high cadmium (Cd) accumulator YSL189 and low Cd accumulator HZ903. Further hydroponics experiments investigated the different tolerance mechanisms to Cd stress between YSL189 and HZ903 at the seedling stage. When Cd concentration was >20 µM in the growing medium, the uptake rate of Cd was significantly higher in roots of YSL189 than it was in roots of HZ903. When plants were supplied with 50 and 100 µM Cd in the growing medium, there were higher Cd concentration, higher biomass and plant height, shorter roots, and higher expression levels of transporter genes natural resistance associated macrophage proteins (Nramp)2, Nramp3, and zinc and iron regulated transporter (ZIP) in roots of YSL 189 compared to HZ903. We infer that the high Cd accumulation in YSL189 was partly due to the higher Cd uptake rate and higher expression levels of Nramp2, Nramp3, and ZIP in its roots. At the same time, the degree of cell injury indicated by thiobarbituric acid reactive substance showed no significant differences in roots and stems between the two genotypes. We attribute this to the higher activities of superoxide dismutase, peroxidase, and catalase in roots and stems of YSL189 compared to HZ903.

Article Details

Responses to cadmium stress in two tomato genotypes differing in heavy metal accumulation

Authors:

Shouping ZHAO | Yongzhi ZHANG | Xuezhu YE | Qi ZHANG | Wendan XIAO

Publisher:

TUBITAK

Journal:

Turkish Journal of Botany 2015 Vol.39 Issue 4, pp.615-624

Document Type:

Article

Publication Date:

8/2015

Document Language:

Turkish

Document ID (Org No.):

2000815737

Frequency:

Bimonthly

eISSN:

1303-6106

pISSN:

1300-008X

Cadmium

tomato

transporter

accumulation

antioxidant enzymes

Issues

Article Details

Responses to cadmium stress in two tomato genotypes differing in heavy metal accumulation

Authors: Shouping ZHAO | Yongzhi ZHANG | Xuezhu YE | Qi ZHANG | Wendan XIAO

Publisher: TUBITAK

Journal: Turkish Journal of Botany 2015 Vol.39 Issue 4, pp.615-624

Document Type: Article

Publication Date: 8/2015

Document Language: Turkish

Document ID (Org No.): 2000815737

Frequency: Bimonthly

eISSN: 1303-6106

pISSN: 1300-008X

Cadmium

tomato

transporter

accumulation

antioxidant enzymes

Issues

Authors:

Shouping ZHAO | Yongzhi ZHANG | Xuezhu YE | Qi ZHANG | Wendan XIAO

Publisher:

TUBITAK

Journal:

Turkish Journal of Botany 2015 Vol.39 Issue 4, pp.615-624

Document Type:

Article

Publication Date:

8/2015

Document Language:

Turkish

Document ID (Org No.):

2000815737

Frequency:

Bimonthly

eISSN:

1303-6106

pISSN:

1300-008X