Abstract
Zinc (Zn) deficiency is a critical nutritional problem for plants and peoples all over the world. Almost half of the world’s cereal crops are deficient in Zn, leading to poor crop yield. In this study, the effect of different Fe/Zn ratio on some physiological parameters of maize seedlings were investigated on the dry matter of shoots and roots and their ratio, SPAD index and the total length of shoots. The relative chlorophyll contents significantly decreased under increasing Fe given to the Zn deficient. The results showed that the different Fe/Zn supplies decreased the total length of shoots - ranging from 9% to 65% - by latent Zn deficiency. Corresponding to several scientific findings, it was observed that the non-optimal Fe/Zn ratio of tissues take part in the evolution of latent Zn deficiency in the case of high Fe concentration.
Highlights
One-third of the world's population is at risk of Zn deficiency in rates ranging from 4% to 73%, depending on the given country
It was observed that the antagonism between Fe, Zn and Mn lead to latent Zn deficiency in the case of high Fe concentration
The dry weight of shoots and roots were measured by OHAUS Explorer analytical balance and their ratio
Summary
One-third of the world's population is at risk of Zn deficiency in rates ranging from 4% to 73%, depending on the given country. Nambiar and Motiramani (1981) established that the Fe/Zn ratio in maize tissue appears to be a promising diagnostic tool for prediction of latent Zn deficiency. Gangwar and Mann (1972) suggested that the excess Fe can cause Zn deficiency in rice. It was observed that the antagonism between Fe, Zn and Mn lead to latent Zn deficiency in the case of high Fe concentration. Cakmak (2000) has published, that the uptake of Fe2+ is stimulated by Zn deficiency and in line with this the Fe2+ accumulates in toxic amounts in the shoots. In case of stress conditions - e.g. Zn deficiency - the accumulation of Fe2+ connect to demage of chloropylls
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