บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Changes in the activities of glutamine synthetase and glutamate dehydrogenase during low temperature storage of asparagus spears and subsequent senescence at 25 deg C.

Enriquez, F. G., Matsui, T., and Kawada, K.

ISHS Acta Horticulturae 553: 337-340.

2001

บทคัดย่อ

Changes in the activities of glutamine synthetase and glutamate dehydrogenase during low temperature storage of asparagus spears and subsequent senescence at 25 deg C.

The glutamine synthetase [glutamate-ammonia ligase] (GS) and glutamate dehydrogenase (GD) activities, and the amino acid contents, of the top and bottom portions of asparagus (Asparagus officinalis cv. Welcome) spears during storage at 1 deg C and after transferring to 25 deg C were investigated. The respiration rate remained low in both portions stored at 1 deg C. However, upon transfer to 25 deg , the respiration rate increased by 23 and 34% in the top and bottom portions, respectively (7 days at 1 deg C + 4 days at 25 deg C). The GS activity increased in the top and bottom portions of spears after 7 days of storage at 1 deg C, but decreased after transferring to 25 deg C. In the top and bottom portions, the decline was approximately 43 and 51%, respectively, after the 16-day storage (14 days at 1 deg C + 2 days at 25 deg C). The GD activity in the top portion was significantly higher than that in the bottom portion after transferring to 25 deg C, following storage at 1 deg C for either 7 or 14 days. Glutamine and glutamic acid contents were significantly higher in the top than in the bottom portion during storage at 1 deg C and after transferring to 25 deg C. The amino acid content decreased with the increase in storage duration.