关键词: 切花菊, 耐低钾指标, 保护酶, 可溶性糖, 淀粉

Abstract: Twenty-three cut chrysanthemum varieties were hydroponically cultured to screen
hypokalemia indicators in seedling and the results showed that in different potassium，plant dry weight，the
amount of potassium and potassium accumulation are significant different between different varieties.
These may be the evaluation indicators of cut chrysanthemum resistance hypokalemia ability. Based on
potassium indicators screened tolerance varieties‘Nannong Yinshan’and‘Nannong Feizi’，intolerance
variety ‘ Nannong Hongfeng ’ . Different patience cut chrysanthemum varieties seedlings were
hydroponically cultured to study the biological response under low potassium stress and the results showed
that under low potassium stress the‘Nannong Hongfeng’chlorophyll content was significantly reduced，
SOD and POD activity were significantly reduced，‘Nannong Yinshan’and‘Nannong Feizi’haven’t
significantly change. Furthermore，soluble sugar content of tolerant varieties were significantly lower and
amylum content have no significant difference. Soluble sugar content of patience weak varieties have no
significant difference，but amylum content decreased significant.

Key words: cut chrysanthemum, low potassium tolerant indicator, protective enzyme, soluble sugar, amylum