Differences in iron stress response and iron uptake in some sorghum varieties

Kannan, S. (1980) Differences in iron stress response and iron uptake in some sorghum varieties. Journal of Plant Nutrition, 2 (3). pp. 347-358.

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Six sorghum (Sorghum vulqaris Pers.,) varieties representing male and female lines and hybrids were examined for their response to Fe‐stress, and their ability to absorb and transport Fe in the absence and presence of phosphate or CaCO,. It was found that the variety 2077‐A (male sterile female line) and the variety CSH‐5 (hybrid of 2077‐A r CS‐3541) showed distinct mechanism to tolerate and recover completely from chlorosis induced by Fe‐stress in 10 days. Furthermore, these 2 varieties were able to reduce the pH from 6.4 to 3.8 in about 9 days, and this was increased to about 6.2 in another 6 days, which period corresponded with the onset of chlorosis and subsequent recovery. The variety 2219‐A (male‐sterile female line) was also able to withstand Fe‐stress, although the chlorosis appeared only mild throughout. This variety also reduced pH from 6.4 to 4.5, but only after 14 days in the presence of CaCO3 (8 mg/1), and this time corresponded to the period of complete recovery from chlorosis. There appears to be no correlation between Fe uptake capacity and tolerance to Fe‐stress in these varieties. The presence of phosphate or CaCO3 in the absorption medium was found to increase Fe absorption and transport in a few varieties

Item Type: Article
Uncontrolled Keywords: Fe‐deficiency, Fe‐stress response, Varietal differences, sorghum
Author Affiliation: Biology and Agriculture Division, Bhabha Atomic Research Centre, Bombay, 400085, India
Subjects: Plant Protection
Plant Protection > Pesticides
Plant Protection > Pests
Crop Improvement > Genetics/Genomics
Crop Improvement > Plant Breeding
Divisions: Sorghum
Depositing User: Ms K Syamalamba
Date Deposited: 29 Jan 2013 08:16
Last Modified: 29 Jan 2013 08:16
Official URL: http://dx.doi.org/10.1080/01904168009362783
URI: http://eprints.icrisat.ac.in/id/eprint/9428

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