Wheat exudates

Z. Prikryl and V. Vancura, Root exudates in plants. VI. Wheat exudation as dependent on growth, concentration gradients of exudates and the presence of bacteria. Plant Soil 57 69 (1980). 

When comparing the two plant species, once again the polarograms were fairly close to one another. For Zn species, especially, the Ep values were very similar for ryegrass and wheat exudates in both species they were slightly more... 

W. A. Ayers and R. H. Thornton, Exudation of amino acid.s by intact and damaged roots of wheat and peas. Plant Soil 2S I93 (1968). 

Formation of stable chelates with phytosiderophores occurs with Fe but also with Zn, Cu, Co, and Mn (Fig. 8) (39,207,208) and can mediate the extraction of considerable amounts of Zn, Mn, Cu, and even Cd in calcareous soils (204,209). There is increasing evidence that PS release in graminaceous plants is also stimulated in response to Zn deficiency (210-212), but possibly also under Mn and Cu deficiency (213). Similar to Fe deficiency, the tolerance of different graminaceous plant species to Zn deficiency was found to be related to the amount of released PS (211,212), but correlation within cultivars of the same species seems to be low (214). It is, however, still a matter of debate as to what extent PS release is a specific response to deficiencies of the various inicronutrients. Cries et al. (213) reported that exudation of PS in Fe-deficient barley was about 15-30 times greater than PS release in response to Zn, Mn, and Cu deficiency. In contrast, PS exudation in Zn-deficient bread wheat was in a similar range as PS... 

F. Zhang, V, Rdmheld, and H. Marschner, Effect of zinc dehciency in wheat on release of zinc and iron mobilizing root exudates. Z. PJIanzeneniaelir. Bodenk. 152 205 (1989). 

C. Chrislensen-Weniger, A. F. Groneman, and J. A. Van Veen, Associative fixation and root exudation of organic acids from wheat cultivars of different aluminium tolerance. Plant and Soil I39A67 (1992). 

B. M. McDougall, Movement of C photosynthatc into the roots of wheat seedlings and exudation of C from intact roots. New Phytologist 69 999 (1970). 

Gartner S, Le Faucheur L, Roinel N, Paris-Pireyre N. Preliminary studies on the elemental composition of xylem exudate from two varieties of wheat by electron probe analysis. Scanning Electron Microsc 1984 IV 1739-1744. 

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