Abstract
Sprouting of subterranean/stubble buds was studied in relation to indole-3-acetic acid (IAA) metabolism in two sugarcane varieties, CoLk 8102 (mid-late maturing) and CoS 88230 (early maturing) during different dates of harvesting in winter season (Nov. to Feb.) during the crop season 1997–98. Sprouting of stubble buds was significantly lesser in December and January than November and February initiated ratoon. Variety CoLk 8102 showed significantly higher bud sprouting per clump than CoS 88230. The sub-optimal temperature prevailing during the month of December and January seems to have more inhibitory effect on bud sprouting in variety CoS 88230. Tryptophan (a precursor of IAA) pool in the stubble buds was more in variety CoLk 8102 than CoS 88230. The tryptophan content in buds was positively correlated with concentration of zinc (essential for IAA synthesis). Specific activities of IAA oxidase and peroxidase were significantly higher in variety CoS 88230, which might have reduced IAA level as observed by relatively lower tryptophan and Zn contents in the stubble buds, thus indicating involvement of IAA in stubble bud sprouting of sugarcane at low temperature.
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Singh, I., Rai, R.K., Solomon, S. et al. Role of Indole-3-Acetic Acid in Sprouting of Subterranean buds in Winter Initiated Sugarcane Ratoon. Sugar Tech 5, 181–183 (2003). https://doi.org/10.1007/BF02943632
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DOI: https://doi.org/10.1007/BF02943632