TY  - JOUR
AB  - Background
Humic acid or chitosan has been shown to increase plant growth, yield and improving physiological  processes in plant, but its roles on alleviating the harmful effect of cadmium on plant growth and some  physiological processes in plants is very rare. Pot experiments were conducted to study the role of 100 and 200 mg/kg dry soil from either humic acid or chitosan on counteracted the harmful effects of cadmium levels (100 and 150 mg/kg dry soil) on radish plant growth and some physiological characters
Results
Cadmium at 100 and 150 mg kg-1 soil decreased significantly length, fresh and dry weights of shoot  and root systems as well as leaf number per plant in both seasons. Chlorophyll, total sugars, nitrogen,  phosphorus, potassium, relative water content, water deficit percentage and soluble proteins as well as  total amino acids contents were also decreased. Meanwhile, cadmium concentration in plants was increased. On the other hand, application of chitosan or humic acid as soil addition at the  concentration of 100 or 200 mg kg-1  increased all the above mentioned parameters and decreased cadmium concentrations in plant tissues. Chitosan at 200 mg kg-1 was the most effective than humic acid at both concentrations in counteracting the harmful effect of cadmium stress on radish plant  growth.
Conclusion
In conclusion, both natural chelators, in particular, chitosan at 200 mg/kg dry soil  can increase the capacity of radish plant to survive under cadmium stress due to chelating the Cd in the soil, and then reduced Cd bio-availability.
AU  - Farouk, S.
AU  - Mosa, A. A.
AU  - Taha, A. A.
AU  - Ibrahim, H. M.
AU  - EL-Gahmery, A.M.
ET  - 2011
KW  - Humic
Chitosan
Cadmium
Radish
Growth
M1  - 2
M3  - ORIGINAL ARTICLE
N1  - 4 cites: http://scholar.google.com/scholar?cites=8612146082860842974&as_sdt=2005&sciodt=0,5&hl=en&num=100
PY  - 2011
SN  - 1997-0838
SP  - 99-116
ST  - Protective Effect of Humic acid and Chitosan on Radish (Raphanus sativus, L. var. sativus) Plants Subjected to Cadmium Stress
T2  - Journal of Stress Physiology & Biochemistry
TI  - Protective Effect of Humic acid and Chitosan on Radish (Raphanus sativus, L. var. sativus) Plants Subjected to Cadmium Stress
UR  - http://www.jspb.ru/issues/2011/N2/JSPB_2011_2_99-116.pdf
VL  - 7
ID  - 173
ER  -