Different Sources Of Phenotypic Variation And Photosynthetic Characteristics Of Nandina Domestica Thunb In Hunan Provinice

In this thesis, Nadine's phenology had been observed, and effection of leave' Pnsynthesis, the content of chlorophyll and the content of anthocyanin had been determined which distributed in six different regions of Hunan Province. Through comparative Stat. analysis, we gained more significant conclusion,this offered experiment foundation to germplasm resource using, cultivation techniques and conservation work, and dig its economic potential, exploited more scientific and more plan.In Hunan, regardless of cultivated or wild Nandina's bud scales opened and bud swelled after the first ten days of Feb.;leave spread out, young sprout began to grow and leave turned green during the first ten days of March; leave recovered peak green during the last ten days of March. Nandina came into bud time during the first ten days of April, germplasm resources inflorescence was basically consistent without the geographical difference. Nandina came into early flowering season during the middle ten days of May; came into later flowering season during the middle ten days of June; came into fruit and seed mature season from June to October; came into leave redden season from Sep.to the last ten days of Oct., eventually turned red in Nov.; came into season of dormant from Nov. to Feb. in the next year. The young leave and leafstalk of Nandina were red (exceptional ones were peak green), company with growing development, the leave's upper surface turned dark green; back surface turned peak green. Leave turned into dark red or yellow after entering autumn. The period of growth was about 180-210 days in Hunan. According to the characters in various periods of growing development, we adopted relevant technical measures of cultivation and management to gain better economic benefit and garden view effect.Nandina's seed sources were rich in Genetic variation from different areas in Hunan. The average variation was up to 27.549%. The average Euclidean distance of genetic was 0.334 between variety seed sources. The Nandinas'distances of genetic were approximate from Yueyang, Hongjiang and Huanghua, so we concluded these into one category.Through analyzing net Pnsynthetic rate and relevance factors, we knew the phenomenon of "lunch break" was the combination of ecological and environmental factors. In one word, the Nandina's Pn was more highly affected by physiological factor than ecological factor.The consistency of CO2 between intercellular space was the critical factor that affected the PAR by analyzing 6 different seed sources. The Cond, Trmol, PAR, H2O and RH affected the PAR in different by variety seed sources. The Nandina from 6 different seed sources potential Pn in turn were Hongjiang>Baijia> Yueyang>Qiyang>Hengshan>Huanghua.The colors of Nandina's leave were determined by Chl, carotenoid, anthocyanin, etc. in Hunan. Light had obviously affect in Nandina's leave forming, that leave occurred red under highlight, occurred green under lowlight. The leaf's physiological characteristics also occurred to difference:the content of Chl was lower than anthocyanin, which made lower ability of Pn and metabolize in red leave; contrarily, in green leave occurred highly ability of Pn and metabolize.