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GrainGenes Reference Report: JEB-44-1709

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Reference	JEB-44-1709
Title	Free polyamines in senescing wheat (triticum aestivum L.)
Journal	Journal of Experimental Botany
Year	1993
Volume	44
Pages	1709-1715
Author	Peeters K Geuns J Laere A
Abstract	The free polyamine content of flag leaves, peduncles, rachis, glumes, and grains of wheat (Triticum aestivum L., cv Castell) plants, ripening under field conditions, has been investigated during three consecutive growing seasons Putrescine was quantitatively the most important of all polyamines detected in these organs Concentrations were highest in the grains, glumes and flag leaves No correlation was found between polyamine content and the onset of senescence of flag leaves and other organs Excised primary leaves, however, showed a decrease in polyamine content in the dark and also in light/dark cycles, but in the latter case only after an initial increase Sink removal of otherwise intact wheat plants caused an accumulation of putrescine in flag leaves at the later stages of senescence, whereas removal of all other leaves was without any significant effect. Putrescine was also recovered in phloem-exudate samples collected throughout the period of grain development. In both grains and glumes, peak concentrations of polyamines were found early during seed development.
Keyword	flag-leaf [ Show all 13 ]

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