摘要
二氧化硫熏气处理后对蚕豆（ＶｉｃｉａｆａｂａＬ．）叶片的伤害可划为３种类型，即不可见伤害、可逆的可见伤害以及不可逆伤害。采用动态熏气的方法初步估计了３类伤害的阈值，不可见伤害阈值小于１３１．２μｇ／ｍ￣３×８ｈｓ，可见伤害阈值为１３２２．８μｇ／ｍ￣３×２ｈｓ，１３２２．８μｇ／ｍ￣３ＳＯ＿２处理时不可逆伤害阈值介于１６ｈｓ（累积小时数，下同）和２４ｈｓ之间，而以７７５．０μｇ／ｍ￣３ＳＯ＿２处理时，则介于３２ｈｓ和４０ｈｓ之间。认为超氧化物歧化酶活性作为不可见伤害和不可逆伤害的指标较为适宜，可见伤害阈值则可沿用传统的５％伤害叶面积作指标。
There are three fnjury types of the leaves of Vicia faba L.when fumigated with different doses of SO_2,i.,invisible injury,visible injury(recoverable)and unrecoverable injury. The threshold values of the three ty es of injury estimated by dynamic fumigation experiments are less than 131.2μg/m￣3 SO_2×8 hs for invisible injury, 1322.8 μg/m￣3 SO_2× 2 hs for visible injury and 1322.8 μg/m￣3 SO_2× 16～24 hs(accumulated) or 775.0 μg/m￣2 SO_2× 32～40 hs for unrecoverable injury. It is suggested that 5% injuried leaf area is suitable for the index of visible injury. Superoxide dismutase activity ean be used as the index of the invisible injury and unrecoverable injury for it is sensitive to SO_2 and changes dramatically with the increase of SO_2 dose.
出处
《植物资源与环境》
CSCD
1994年第3期49-53,共5页
Journal of Plant Resources and Environment
关键词
二氧化硫
伤害类型
蚕豆
叶片
sulfur dioxide
injury type
Vicia faba L.
