摘要
以9个不同产地的紫苏为研究材料,比较叶片解剖结构、色素含量、光合特性的差异。结果表明:不同产地紫苏叶片均属于异面叶类型,栅栏组织均由1列排列紧密的长柱形细胞构成,其叶片海绵组织细胞2~3层,叶片下表皮有较多的气孔和腺毛,叶片气孔多为卵圆形;不同产地紫苏叶片的气孔直径和密度存在差异;其中,烟台紫苏的气孔直径最大,无锡紫苏的气孔密度最大,南京紫苏的气孔直径和密度均为最小;不同产地紫苏叶绿素和花色苷含量差异较大,叶色越紫,花色苷含量越高,叶绿素含量越低,而保定、邯郸和邢台三地紫苏同时有较高的叶绿素和花色苷含量;紫苏叶片花色苷含量与净光合速率之间存在负相关性,如烟台紫苏花色苷含量较低,其净光合速率较高,而南京紫苏花色苷含量较高,其净光合速率较低;不同产地间紫苏叶片解剖结构和叶片色素含量均存在差异,并且与净光合速率存在一定的相关性。本研究为紫苏种质资源及育种研究奠定了基础。
In this study, we investigated the leaf anatomical structure, pigment content, and photosynthetic characteristics of Perilla frutescens from 9 sites. The results showed that all the leaves of P. frutescens from the 9 sites were biracial leaf, containing a palisade tissue with onelayer tightly arranged long columnar cells and a spongy tissue with 2 or 3 layers cell. Further- more, there were more stomata （mostly oval） and glandular hairs in the lower epidermis of the leaves. The diameter and density of stomata of P. frutescens significantly differed among different sites. The P. frutescens from Yantai had the largest stomata diameter, and that from Wuxi had the greatest stomata density. Nevertheless, the stomatal diameter and density of the P. frutescens from Nanjing were the minimum. The contents of chlorophyll and anthocyanin of P. frutescens from the different sites showed significant differences. The more purple leaf color was, the higher anthocy- anin content and the lower chlorophyll content were. However, the leaf of the P. frutescens from Baoding, Handan and Xingtai had higher contents of chlorophyll and anthocyanins. There was a negative correlation between the anthocyanin content and net photosynthetic rate in P. frutescens leaves. For example, the P. frutescens from Yantai had a lower anthocyanin content but higher net photosynthetic rate, while the P. frutescens from Nanjing had a higher anthocyanin content but lower net photosynthetic rate. The leaf anatomical structure and pigment content of P. frutescens were significantly different among different sites, and they had a certain correlation with net photosynthetic rate. This study laid a foundation for further study on germplasm resources and breed- ing of P. frutescens.
出处
《生态学杂志》
CAS
CSCD
北大核心
2017年第6期1590-1596,共7页
Chinese Journal of Ecology
基金
国家公益性行业科研专项(201407002)
江苏省优势学科(中药学)二期建设工程项目资助
关键词
紫苏
叶片解剖结构
叶绿素
花色苷
光合特性
Perilla frutescens
leaf anatomical structure
chlorophyll
anthocyanins
photosyn- thetic characteristics.
