บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Studies on minimizing dextran problems in sugar cane under subtropical conditions.

Sharma, K. P., Batta, S. K. and Ranjil Singh

Tropical Agriculture Year: 1994 Vol: 71 Issue: 2 Pages: 119-122 Ref: 13 ref.

1994

บทคัดย่อ

Studies on minimizing dextran problems in sugar cane under subtropical conditions.

ABSTRACT :

 

The natural occurrence of pre-harvest dextran (synthesized by Leuconostoc mesenteroides) was studied in fresh sugarcane grown at three geographically diverse locations in Indian Punjab. Cane samples were collected from 48 genotypes at Jalandhar in 1984/85, while in 1985/86 in addition to the 1st ratoon of these genotypes at Jalandhar, 6 'CoJ' genotypes were sampled at 2 other locations. Incidence of dextran ranged from 20 to 100% at Jalandhar whereas no dextran was detected in cane at other locations. Dextran levels associated with genotypes over all locations varied widely but differences were not significant. However, there was a trend of reduced dextran content in the test genotypes with medium levels of sugar compared with levels reported in subtropical areas. In post-harvest studies, the rate of change of weight loss, sucrose decline, and dextran development were predicted by regression equations for two genotypes during 7 days of storage at 20 or 30 deg C. The rate of weight loss was 1.48%

 for CoJ 64 and 1.25% for CoJ 79 per day stored at 20 deg and was 3.00 and 2.12% per day, respectively, for canes stored at 30 deg . Cold storage significantly reduced the rate of sucrose loss and dextran development in both genotypes. Rate of post-harvest losses was significantly lower in CoJ 79 than in CoJ 64 at both temperatures.