Auxin-induced biochemical changes in isolated leaves
Tóm tắt
Leaves ofVinca rosea L. were treated with Indole-3-butyric acid and analysed 2, 4 and 6 days later during the organisation of root initials. At the three periods the total sugar content increased by 5·2, 4·4 and 7·3% of the fresh weight respectively, the sucrose by 5·16, 6·99 and 5·90%, the reducing sugar by −0·25, −0·90 and +1·1%; the total nitrogen by 0·1, 0·65 and −0·05%, the soluble nitrogen by 0·02, 0·15 and 0·06% and the protein nitrogen by 0·08, 0·5 and −0·1% respectively. The percentage titratable acidity increased by 0·35 and 3·61 two and four days after auxin treatment but decreased by 0·23 by the 6th day after treatment. CO2 output increased by 0·92, 0·48 and 3·10% in the auxin-treated leaves over those of the corresponding controls two, four and six days after auxin application respectively. Titratable acidity showed an initial absolute increase two days after auxin treatment with a sharp decline thereafter while controls showed a slight rise followed by a slow decrease.
Tài liệu tham khảo
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