Open AccessKaryotypes of Sarcandra Gardn. and Chloranthus Swartz (Chloranthaceae) from China
Author(s) -
KONG HONGZHI
Publication year - 2000
Publication title -
botanical journal of the linnean society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.872
H-Index - 68
eISSN - 1095-8339
pISSN - 0024-4074
DOI - 10.1111/j.1095-8339.2000.tb01549.x
Subject(s) - biology , botany , ploidy , karyotype , chromosome , genetics , gene
Two species of Sarcandra and nine of Chloranthus in the Chloranthaceae from China were investigated cytologically. The basic chromosome number of both genera is x=15. In Sarandra the two species studied are diploid, and in Chloranthus seven species are diploid, one tetraploid ( C. fortune;, 2n = 60) and one hexaploid (C. henryi, 2n = 90). Chromosomes are medium‐small to small, ranging in length from c . 6.0 μm to 1.O μ m. The katyotype formulas are as follow: S. glabra 2 n= 10m+ 10sm + 8st + 2stc; & hainanensvs 2n = 8m+ 12sm + 8st+2st sat ; C. spicatus 2n=12m+8sm + 6st + 4st sat ; C. erectus 2n= 12m + 4sm+ 12st + 2st sat ; C. serratus 2n=16m + 12sm + 2st sat ; C. sessilifolius 2n= 14m + 8sm + 6st+2st sat ; C. nervvosus 2n = 8m + 4sm + 6st + 2st sat ; C. angustfolius 2n = 20m + 6sm + 2sm sat + 2st sat ; C. japonicus 2n = 18m + 8sm + 4st sat ; C. fortunei 2n= 48m+4sm + 4st + 4st sat . Karyotype asymmetries are of type 3B in C. erectus and C. nervosus and 2B in the other species. Based on these results, combined with the evidence from comparative morphology, anatomy, palynology and embryology, the relationship between Sarcandra and Chloranthus is discussed.