Topic
Michelia
About: Michelia is a research topic. Over the lifetime, 198 publications have been published within this topic receiving 1565 citations. The topic is also known as: Magnolia sect. Michelia.
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Journal Article•
TL;DR: Karyotypes of 12 species of Michelia in the Magnoliaceae were studied and it is found that the karyotype data in Michelia may be hardly useful for infrageneric taxonomy.
Abstract: Karyotypes of 12 species of Michelia in the Magnoliaceae were studied. Their karyotype formulas are: M. macclurei var. sublanea 2n=34m(2SAT)+4sm; M. alba 2n=34m+4sm; M. floribunda 2n=30m+8sm; M. champaca 2n=32m+6sm; M. shiluensis 2n=32m+6sm; M. platypetala 2n=32m+6sm(2SAT); M. figo 2n=32m+6sm; M. maudiae 2n=32m+6sm; M. longistamina 2n=32m+6sm; M. foveolata 2n=34m+4sm;M. skineriana 2n=30m+8sm;M. wilsonii 2n=30m+8sm(2SAT). All the species are of the symmetrical karyotype. The karyotypes all belong to 2A type except that of M. floribunda which is of 1A type. Due to the karyotype similarity among species, the karyotype data in Michelia may be hardly useful for infrageneric taxonomy.
2 citations
TL;DR: Chen et al. as discussed by the authors reported the complete chloroplast genome of Michelia chartacea B. L. Chen and S. C. Yang was 160,138 bp in length.
Abstract: In this study, the complete chloroplast genome of Michelia chartacea B. L. Chen & S. C. Yang was 160,138 bp in length. It includes a large single-copy (LSC) region of 88,164 bp, a small single-copy...
2 citations
Journal Article•
TL;DR: The diurnal changes trend and the values of Fv/Fm in a whole day in winter indicated that the effects of stress on the photosynthetic tissues of four michelia trees were only reversible.
Abstract: The diurnal changes of chlorophyll fluorescence parameter Fv/Fm of seedlings of Michelia maudiae,Michelia platypetala,Michelia foveolata and Michelia wilsonii in different seasons and correlations be-tween Fv/Fm values and photosynthetically active radiation(PAR),air temperature(Ta)and air humidity(RH)were studied in this paper.The diurnal change range of Fv/Fm of four michelia trees in spring was small and the values in a whole day were higher than 0.75.There was no significant correlation between the chlorophyll fluo-rescence parameter Fv/Fm of four michelia trees and PAR,Ta and RH in spring.The values of Fv/Fm in a wole day in summer showed a trend of descending first and then ascending and the lowest values(﹤0.75)appeared between 12:00 and 14:00.A negative relation was founded between Fv/Fm value of Michelia maudiae and Ta and RH,while a positive correlation between Fv/Fm value of Michelia platypetala and Ta and RH in summer;there was a significant negative correlation between Fv/Fm value of Michelia foveolata and PAR and Ta in summer.Based on the diurnal changes trend and the Fv/Fm value in a whole day,the effects of reversible stress on the photosynthetic tissues of Michelia maudiae,Michelia platypetala and Michelia foveolata were founded in summer from 12:00 to 14:00.The significant negative correlation and positive correlation between the values of Fv/Fm of Michelia wilsonii and Ta and RH were also founded in summer,respectively.The values of Fv/Fm of Michelia wilsonii in a whole day in summer were below 0.75,indicating that there was irreversible stress effect on the pho-tosynthetic tissues of Michelia wilsonii in summer.The diurnal change of Fv/Fm of Michelia wilsonii in autumn presented a trend of descending first and then ascending,and the lowest value(0.72)was at 14:00,and there was a significant postive correlation between the value of Fv/Fm and RH.The diurnal changes of Fv/Fm of the other three michelia trees in autumn were small,and the values were higher than 0.75 in a whole day.Meanwhile,no significant correlation between the values of Fv/Fm of three michelia trees mentioned above,and PAR,Ta and RH were founded from experimental results in autumn.The diurnal changes of Fv/Fm of four michelia trees in winter were ascending at first and then descending,and significant postive correlation between the Fv/Fm and Ta was showed from the experimental results.The diurnal changes trend and the values of Fv/Fm in a whole day in winter indicated that the effects of stress on the photosynthetic tissues of four michelia trees were only reversible.
2 citations
2 citations
Journal Article•
TL;DR: The result showed that the shape and germination aperture of 9 speices are similar, but their size and exine sculpture are different, and so are the different population of one species.
Abstract: The pollenmorphology characteristics of 9 species of Magnoliaceae (Sinomanglietia glauca , Manlietia patungensis , Magnolia denudata , Magnolia biondii , Magnolia amoena , Michelia caloptila , Michelia chapensis , Michelia maudiae , Magnolia zenii )were observed by both optical microscope and scanning electron microscope (SEM), the result showed that the shape and germination aperture of 9 speices are similar , but their size and exine sculpture are different , and so are the different population of one species .Therefore , pollen morphology can be applied for taxonomy of Magnoliaceae to some extent , and it is important to adopt these evidence carefully combined with other evidence .[ Ch , 1 fig .1 tab .8 ref .]
2 citations