ZHAO Xiao-mei,WANG Hong-mei,YANG Wei,et al.Effects of Different Ca2+ Concentrations on the Growth，Photosynthetic Characteristics， Protective Enzyme Activity of Watermelon Seedling[J].Northern Horticulture,2012,36(14):144-146.
钙对西瓜幼苗生长、光合特性及保护性酶活性的影响
- Title:
- Effects of Different Ca2+ Concentrations on the Growth，Photosynthetic Characteristics， Protective Enzyme Activity of Watermelon Seedling
- 文章编号:
- 1001-0009(2012)14-0144-03
- Keywords:
- Ca 2+ ; watermelon seedling; growth; photosynthetic characteristics; enzyme activity
- 分类号:
- S 651
- 文献标志码:
- A
- 摘要:
- 采用营养液水培方式，以‘早佳（8424）’西瓜为试材，研究了不同钙浓度水平对西瓜幼苗生长、光合特性及保护性酶活性的影响。结果表明：0和50 mg/L钙处理的幼苗生长缓慢，POD、SOD活性显著高于其它处理；220 mg/L处理的生长速度最快，株高最高；190 mg/L处理的叶片数、植株鲜重、干重、根系长度，净光合速率Pn、气孔导度Gs、胞间CO2浓度Ci、叶绿素含量显著高于其它处理。因此，在0~220 mg/L钙浓度范围内，提高营养液中钙离子浓度，可以促进植株生长，增强光合作用，增加有机物的合成与积累。
- Abstract:
- Take the‘Zaojia(8424)’watermelon as materials，the effects of different Ca 2+ concentrations on the growth，photosynthetic characteristics，protective enzyme activity of watermelon seedling in nutrient were studied.The results showed that the growth of watermelon seedlings was slow in 0~50 mg/L of Ca 2+ ，but POD and SOD activity were significantly higher than that in other treatments.The growth rate and plant height was the best at 220 mg/L of Ca 2+.In the treatment of 190 mg/L of Ca 2+ ，leaf numbers，fresh weight，dry weight，root length，net photosynthesis rate（Pn），stomatal conductance（Gs），intercellular carbon dioxide concentration（Ci）and chlorophyll content of seedlings were significantly higher than that in other treatments.It could be concluded that within 0~220 mg/L of Ca2+，it could promote the plant growth，improve photosynthesis and increase the synthesis and accumulation of organic matter if Ca 2+ in nutrient was improved.
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备注/Memo
第一作者简介：赵晓美（1986-），女，硕士，研究方向为蔬菜营养及无土栽培。
责任作者：龙明华（1961-），男，博士，教授，博士生导师，现主要从事蔬菜及花卉育种与无公害农产品生产和无土栽培及组织培养技术等的教学与科研工作。
基金项目：国家科技支撑计划资助项目（2007BAD68B04）；广西研究生教育创新资助项目（GXU11T32562）。
收稿日期：2012-03-30