Wheat developmental stages

Pterins make no contributions to the colors of plants and microorganisms. One important pterin is the folate produced by plants and microorganisms. Folate and its derivatives are present in plants in various concentrations in mitochondria, cytosols, vacuoles, and plastids. The total amount of fohc acid depends on the plant species, on the developmental stage, and on external factors. Good sources of folates are beans, lentils, spinach, and wheat germ. ... 

DIBOA was also found in aqueous extracts of rye pollen [64] and it was identified as a component of root exudates from rye (0.7 - 25 pmol / kg fresh weight). However, DIBOA contents in rye exudates differ considerably depending on cultivars (cv. Forrajero Blaer 25 pmol / kg fr wt cv. Tetra Blaer 0.07 pmol / kg fr. wt.). Interestingly, wheat cultivars tested did exude neither DIBOA nor DIMBOA, although roots of the wheat cultivar Alifen contained similar amounts of DIBOA than present in roots of rye cultivars [175]. On the other hand, benzoxazinones have not only been isolated isolated from rye but also from wheat and com exudates [68,176]. Possibly, the developmental stage and plant fitness regulate the composition of root exudate constituents. 

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