NDLI: Uptake and transport of foliar applied zinc ($^{65}$Zn) in bread and durum wheat cultivars differing in zinc efficiency

Content Provider	Springer Nature Link
Author	Ereglu, B. Nikolic, M. Römheld, V. Cakmak, I.
Copyright Year	2002
Abstract	Using two bread wheat (Triticum aestivum) and two durum wheat (Triticum durum) cultivars differing in zinc (Zn) efficiency, uptake and translocation of foliar-applied $^{65}$Zn were studied to characterize the role of Zn nutritional status of plants on the extent of phloem mobility of Zn and to determine the relationship between phloem mobility of Zn and Zn efficiency of the used wheat cultivars. Irrespective of leaf age and Zn nutritional status of plants, all cultivars showed similar Zn uptake rates with application of $^{65}$ZnSO$_{4}$ to leaf strips in a short-term experiment. Also with supply of $^{65}$ZnSO$_{4}$ by immersing the tip (3 cm) of the oldest leaf of intact plants, no differences in Zn uptake were observed among and within both wheat species. Further, Zn nutritional status did not affect total uptake of foliar applied Zn. However, Zn-deficient plants translocated more $^{65}$Zn from the treated leaf to the roots and remainder parts of shoots. In Zn-deficient plants about 40% of the total absorbed $^{65}$Zn was translocated from the treated leaf to the roots and remainder parts of shoots within 8 days while in Zn-sufficient plants the proportion of the translocated $^{65}$Zn of the total absorbed $^{65}$Zn was about 25%. Although differences in Zn efficiency existed between the cultivars did not affect the translocation and distribution of $^{65}$Zn between roots and shoots. Bread wheats compared to durum wheats, tended to accumulate more $^{65}$Zn in shoots and less $^{65}$Zn in roots, particularly under Zn-deficient conditions. The results indicate that differences in expression of Zn efficiency between and within durum and bread wheats are not related to translocation or distribution of foliar-applied $^{65}$Zn within plants. Differential compartementation of Zn at the cellular levels is discussed as a possible factor determining genotypic variation in Zn efficiency within wheat.
Starting Page	251
Ending Page	257
Page Count	7
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	241
Issue Number	2
e-ISSN	15735036
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2002-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ecology Plant Sciences Plant Physiology Soil Science & Conservation
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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