บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Effect of boron applications on physiological disorders in Conference pears during CA-storage.

Xuan, H., Streif, J. and Bangerth, F.

ISHS Acta Horticulturae 553: 249-254.

2001

บทคัดย่อ

Effect of boron applications on physiological disorders in 'Conference' pears during CA-storage.

Under particular CO2 levels in controlled atmosphere (CA) storage 'Conference' pears are susceptible to physiological disorders, such as brownheart and cavities. The effect of preharvest boron sprays on several physiological parameters and on the subsequent occurrence of brown heart in pears stored under high CO2 in CA, was tested. Trees of 'Conference' pears were sprayed with boron several times before harvest. After harvest the fruits was stored in CA (5% CO2, 2% O2) at -0.5 deg C. During the 4-months storage period, the pears were rated for physiological disorders and the permeability of cell membranes, mineral concentrations, vitamin C content and fruit quality parameters were determined. The results show that brown heart symptoms appeared in the control fruits already after 2 months' storage. On the other hand, fruits treated with boron did not exhibit any brown heart disorder. Boron treatment reduced membrane permeability well in advance of the appearance of browning symptoms in the control fruits, and increased boron and vitamin C content, without affecting macronutrient levels and other fruit quality parameters. The importance of B for the integrity of membranes and for cellular defence mechanisms is discussed.