Photosynthetica 2000, 38(3):477-479 | DOI: 10.1023/A:1010958512210

Differential Responses of Iron, Magnesium, and Zinc Deficiency on Pigment Composition, Nutrient Content, and Photosynthetic Activity in Tropical Fruit Crops

K. Balakrishnan1, C. Rajendran2, G. Kulandaivelu3
1 Department of Crop Physiology, Horticultural College and Research Institute, Periyakulam, India
2 Dept. of Crop Physiology, Agricultural College and Research Institute, Madurai, India
3 Madurai Kamaraj University, Madurai, India

Fe, Mn, and Zn affected the chlorophyll (Chl) content whereas Fe deficiency caused larger reduction of total chlorophyll content than Mg and Zn deficiencies. Mg deficient mango had a higher Chl a/b ratio than the respective healthy plants. The foliar contents of Fe, Zn, and Mg in the deficient leaves were lower than the critical level. Nutrient deficiency significantly affected the Fv/Fm ratios as observed from the Chl fluorescence induction curves. Fe deficiency resulted in larger reduction of variable fluorescence than Mg and Zn deficiency.

Additional key words: Achras; chlorophyll fluorescence; Citrus; Eugenia; jamun; Mangifera; mango; nutrient deficiency; sapota; sweet orange

Prepublished online: April 1, 2000; Published: October 1, 2000  Show citation

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Balakrishnan, K., Rajendran, C., & Kulandaivelu, G. (2000). Differential Responses of Iron, Magnesium, and Zinc Deficiency on Pigment Composition, Nutrient Content, and Photosynthetic Activity in Tropical Fruit Crops. Photosynthetica, 38(3), 477-479. doi: 10.1023/A:1010958512210
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