不同烤烟品种抗旱生理特征比较研究  

Comparison of Drought Resistance Characteristics of Different Flue-cured Tobacco Varieties

作　　者：任庆成[1] 陈秀华 张生杰[1] 贾燕超[1] 段旺军[1] 杨铁钊[1] 

机构地区：[1]河南农业大学烟草学院,郑州450002 [2]河南省烟草专卖局,郑州450008

出　　处：《西北植物学报》2009年第10期2019-2025,共7页Acta Botanica Boreali-Occidentalia Sinica

基　　金：河南省烟草专卖局重点资助项目(HYKJ200604)

摘　　要：以4个抗旱性不同的烤烟品种(系)为材料,采用盆栽试验测定了它们在干旱胁迫条件下的生物量以及叶片相对含水量、保水力、净光合速率、脱落酸含量等生理指标,并用隶属函数法对它们的抗旱性进行综合评价,以探讨烤烟的抗旱生理机制。结果表明:在干旱胁迫条件下,各品种烟株的鲜、干重积累量、叶片相对含水量及净光合速率均下降,但‘豫烟6号’和‘农大202’降幅相对较小;各品种烟株的丙二醛和脱落酸含量在干旱胁迫下均显著增加,且脱落酸含量以‘豫烟6号’的增加量最大,‘NC89’最小,丙二醛含量以‘NC89’增加量最大,‘农大202’和‘豫烟6号’相对较小;‘豫烟6号’在干旱胁迫下的叶片保水能力极限著差高于‘K326’、‘NC89’;隶属函数法综合分析结果显示,‘豫烟6号’的抗旱性最强,‘农大202’次之,‘NC89’最差。研究发现,各烟草品种的植株形态和生理指标在干旱条件下存在明显的差异,抗旱性强的品种表现出较高的叶片保水力、净光合速率、生物量和脱落酸含量,以及较低的丙二醛含量,且除脱落酸含量外大多指标的升降幅度较小。Drought resistance of 4 different tobacco cultivars was studied under drought conditions caused by controlling irrigation,some indexes,including the accumulation of the plant,leaf relative water content,water-holding capacity,net photosynthetic rate and ABA content,were screened and evaluated.The results showed that：in arid conditions,both plant fresh and dry mass,leaf relative water content and photosynthetic rate decreased,but the range of ＇Yuyan 6＇（YY 6）and ＇Nongda 202＇（ND202）were relactively less;While the contents of MDA and ABA have a significant increase.＇NC89＇ had the most increasing amount of MDA,YY 6 and ND 202 were relatively less.For ABA content,YY 6 had the most increasing amount,＇NC89＇ had the least;YY 6 had higher water-holding capacity than that of ＇K326＇ and ＇NC889＇ in the drought conditions;YY 6 performed stronger drought ability than that of ND 202 and ＇NC89＇ the weakest.The study found that there are obvious differences between flue-cured tobacco genotypes in plant morphometrics and physiological index under the drought stress.The drought resistant varieties showed a higher leaf water retention capacity,the net photosynthetic rate,biomass,abscisic acid content,and a lower MDA content.The physiologic indexes except ABA content varied less under drought stress.

关 键 词：烤烟 遗传特性 抗旱性 生长量 叶片保水力 隶属函数 

分 类 号：Q948.112.3[生物学—植物学]