Proline partially overcomes excess molybdenum toxicity in cabbage seedlings grown in vitro.

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Proline partially overcomes excess molybdenum toxicity in cabbage seedlings grown in vitro.
出版類型SCI(Sciences Citation Index)
AuthorsJ Kumchai, 圖克, Jian-Zhi Huang 黃建誌, Chen-Yu Lee 李鎮宇, Shih Wen Chin 金石文, & Fure-Chyi Chen 陳福旗
出版日期2013 / 11

ABSTRACT. In vitro grown cabbage (Brassica oleracea var. capitata)
seedlings exposed to excess molybdenum (Mo) ions exhibited severely
reduced plant growth at the cotyledonary stage. Adding 80 mM proline
(Pro) to the Mo-treated medium could help 50% seedlings to overcome
the toxicity and grow true leaves. Under excess Mo stress, seedlings
accumulated blue/purple anthocyanin in their cotyledons and hypocotyls.
The anthocyanin content under Mo with 40 mM Pro was 4-fold higher
than the control medium, MS with 40 mM Pro. The presence of Pro in the
excess-Mo condition reduced chlorophyll a, whereas the chlorophyll b
content was much higher than the control media of MS with and without
Pro. Moreover, supplementing various concentrations of Pro into the
Mo-stressed condition promoted the seedlings with higher antioxidant
enzyme activities of superoxide dismutase, ascorbate peroxidate,
and catalase. In addition, genes in the anthocyanin biosynthesis and
accumulation pathways, phenylalanine ammonia lyase (PAL), chalcone
synthase (CHS), flavonone 3-hydroxylase (F3H), leucoanthocyanidin
dioxygenase (LDOX), and glutathione-S-transferase (GST), were all
upregulated. Our study indicated that, under excess Mo stress, the
antioxidant activity of cabbage seedlings was induced in an attempt to
protect plants from the Mo-induced toxicity and exacerbated growth.
Pro, on the other hand, functioned in producing higher antioxidant
enzyme activity to partially help recover plant growth.

期刊名稱Genetics and molecular research: GMR
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