紫薇突变体gl1和野生型叶片解剖结构及叶绿素荧光参数比较

Comparison on anatomical structures and chlorophyll fluorescence parameters of leaves of mutant gl 1 and wild type of Lagerstroemia indica

以紫薇(Lagerstroemia indica Linn.)品种‘粉晶’(‘Fenjing’)为野生型对照,对紫薇黄叶突变体gl1叶片横切面解剖结构和叶绿素荧光参数进行研究。结果表明:与野生型相比,突变体gl1叶片的栅栏组织排列疏松,叶绿体较少;上表皮厚度、下表皮厚度、海绵组织厚度和非调节性能量耗散的量子产额极显著(P<0.01)升高,叶片厚度、光适应下初始荧光和调节性能量耗散的量子产额显著(P<0.05)升高,而栅栏组织厚度、栅海比、光适应下最大荧光、光适应下最大光化学效率、电子传递速率和实际光量子产额极显著下降。结果显示:紫薇突变体gl1特有的叶片解剖结构导致其对光能的吸收和利用效率均较低。

Taking cultivar‘Fenjing’of Lagerstroemia indica Linn.as the control of wild type,the transverse anatomical structures and chlorophyll fluorescence parameters of leaves of yellow-leaf mutant gl1 of L.indica were researched.The results show that compared with the wild type,the palisade tissue loosely arranges and chloroplasts are less of leaves of mutant gl1;the upper epidermal thickness,lower epidermal thickness,spongy tissue thickness,and quantum yield of non-regulated energy dissipation extremely significantly(P<0.01)increase,the leaf thickness,initial fluorescence under light adaptation,and quantum yield of regulated energy dissipation significantly(P<0.05)increases,while the palisade tissue thickness,ratio of palisade tissue to spongy tissue,maximum fluorescence under light adaptation,maximum photochemical efficiency under light adaptation,electron transport rate,and actual light quantum yield extremely significantly decrease.It is suggested that the unique leaf anatomical structure of mutant gl1 of L.indica results in low light energy absorption and utilization efficiency.