摘要
采用盆栽控制浇水的方法对6个伸长期的甘蔗材料进行水分胁迫处理,测定不同水分胁迫时期叶片的净光合速率、蒸腾速率、气孔导度、胞间CO2浓度以及水分利用率。试验结果表明:不同甘蔗材料随着干旱胁迫程度的增加,净光合速率、蒸腾速率、气孔导度均呈下降趋势;胞间CO2浓度、水分利用率随干旱胁迫时间的增加呈现不同的变化趋势。净光合速率与蒸腾速率、气孔导度与蒸腾速率、胞间CO2浓度与净光合速率以及胞间CO2浓度与水分利用率均呈现较高的相关性。综合分析可知,ROC22和割手密的抗旱能力较强,果蔗和KN90-445的抗旱能力适中,大茎野生种和ROC16的抗旱能力较弱。
The photosynthetic characters and water use efficiency were measured under drought stress with six sugarcane materials planted in pots. The results showed that net photosynthetic rate, transpiration rate and stomatal conductance all decreased, but intercellular CO2 concentration and water use efficiency had different change tendency with the increasing of drought stress time. There was higher correlation among photosynthetic traits in different sugarcane materials. ROC22 and S. spontaneum L. performed to be highly resistant to drought. Fruit Sugarcane and KN90-445 performed middle resistance. S. robustum Brandes et Jeswiet ex Grassl and ROC16 performed to be poor resistant to drought.
出处
《甘蔗糖业》
2013年第1期14-18,共5页
Sugarcane and Canesugar
基金
中央级公益性科研院所基本科研业务费专项"甘蔗种质资源收集及其抗旱生理机制研究"(sscri201006)
"甘蔗抗氧化系统关键酶基因的克隆与表达分析"(ITBB120504)
海南省自然科学基金项目"干旱胁迫对甘蔗生理活动的影响及抗旱相关基因的克隆"(311092)
关键词
甘蔗
干旱胁迫
光合特性
水分利用率
Sugarcane
Drought stress
Photosynthetic characters
Water use efficiency
