Floral variation of Michelia coriacea, a critically endangered species
The floral variation of 56 flowers from 7 plants of Michelia coriacea H.T.Chang et B.L.Chen in Kunming Arboretum was observed.The results show that the numerical,morphological and size characters of their floral parts are varied.There are 12 floral parts such as the internorle of floral brachyblast,the whorl,the tepal and so on,in numerical variation.Their coefficients of variance are from 6.17% to 219.33%,of which the biggest one is in the third-whorled tepals.There are 11 floral characters such as the indumentum on peduncle,the shapes of the tepal,the colors of the tepal and so on,in morphological variation.Their variations among different individuals are more than those in a same single plant and most of their differences are very significant.Their coefficients of variance are from 9.13% to 229.35%,of which the biggest one is in the length of the pedicle.Summarized all a-bove,the variations of two floral parts including tepal and stamen are the biggest.The two floral parts are main varied organs of the species.There are more variations among the individuals than those in a same single plant in this species so that it will present a scientific basis for the occurrence possibility and the breeding selection of excellent individuals.The phenomenon of heterobathmy also occurs in Michelia coriacea.This species is a more evolutional species in Magnoliaceae although there are many primitive and evolutional characters in it.
Michelia coriacea H. T. Chang et B. L Chenfloral partvariationanalysis of variance
NETL
NSTL
万方数据
维普
