J Syst Evol ›› 2015, Vol. 53 ›› Issue (6): 520-528.doi: 10.1111/jse.12154

• Research Articles • Previous Articles     Next Articles

Behind the diversity: Ontogenies of radiate, disciform, and discoid capitula of Chrysanthemum and its allies

Jia-Bin Ren and Yan-Ping Guo*   

  1. Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, College of Life Sciences, Beijing Normal University, Beijing, China
  • Received:2014-12-19 Online:2015-03-27 Published:2015-05-25

Abstract: Asteraceae are distinguishable by their head-like inflorescence called a capitulum. There are a variety of capitulum types due to different combinations of different composing florets. Morphological evolution of capitula must involve homoplasy under selective constraints. Therefore, a comparative examination of ontogenies of divergent capitula among phylogenetically close taxa is important to investigate the genetic and molecular bases of this trait. In the subtribe Artemisiinae, tribe Anthemideae, three closely related genera have different flower heads: Chrysanthemum with the radiate, Ajania with the disciform, and Stilpnolepis with the discoid capitula. Through observations using scanning electron microscopy, we examined the morphogenetic processes of flower heads of representative species of these genera. The morphological differentiation of the discoid from the radiate/disciform capitula occurred early in the floral initiation stage. The development of the ray/marginal florets of the radiate/disciform capitula lagged behind the outermost disc florets throughout the phases of floral initiation and floral organogenesis. Primordia of their 1–2 dorsal corolla lobes and all stamens ceased to grow soon after initiation. In contrast, all florets on a discoid capitulum developed equally in rates and modes into bisexual actinomorphic flowers. Differentiation between the radiate and the disciform capitula occurred late during the floral maturation stage. Our data provided evidence to the interpretation that uniformly acropetal development only occurs in species with homogamous flower heads, and to the idea that the timing of ontogenetic divergence between taxa is positively correlated with the phylogenetic distance of the taxa.

Key words: Asteraceae, capitulum, floral symmetry, morphogenesis, scanning electron microscope (SEM)

[1] Jingbo Zhang, Peter F. Stevens, Wenheng Zhang. Evolution of floral zygomorphy in androecium and corolla in Solanaceae . J Syst Evol, 2017, 55(6): 581-590.
[2] Yuan Huang, Yi-ming An, Shi-yong Meng, Yan-Ping Guo, Guang-Yuan Rao. Taxonomic status and phylogenetic position of Phaeostigma in the subtribe Artemisiinae (Asteraceae) . J Syst Evol, 2017, 55(5): 426-436.
[3] Xiang-Ping Wang, Shuang-Quan Huang. Interspecific and intraspecific variation in corolla tube length in Pedicularis species achieved by both cell anisotropy and division . J Syst Evol, 2017, 55(3): 208-214.
[4] Zhi-Xi Fu, Bo-Han Jiao, Bao Nie, Guo-Jin Zhang, Tian-Gang Gao, China Phylogeny Consortium. A comprehensive generic-level phylogeny of the sunflower family: Implications for the systematics of Chinese Asteraceae . J Syst Evol, 2016, 54(4): 416-437.
[5] Tao DENG, Ying MENG, Hang SUN, Ze-Long NIE. Chromosome counts and karyotypes in Chaetoseris and Stenoseris (Asteraceae-Cichorieae) from the Hengduan Mountains of SW China . J Syst Evol, 2011, 49(4): 339-346.
[6] Rubén TORICES*. Adding time-calibrated branch lengths to the Asteraceae supertree . J Syst Evol, 2010, 48(4): 271-278.
[7] Ying MENG,Hang SUN, Yong-Ping YANG, Ze-Long NIE . Polyploidy and new chromosome counts in Anaphalis (Asteraceae: Gnaphalieae) from the Qinghai-Tibet Plateau of China . J Syst Evol, 2010, 48(1): 58-64.
[8] Jian-Wen ZHANG, Ze-Long NIE, Hang SUN. Cytological study on the genus Syncalathium (Asteraceae-Lactuceae), an endemic taxon to alpine scree of the Sino-Himalayas . J Syst Evol, 2009, 47(3): 226-230.
[9] Jian-Hua HAO, Sheng QIANG, Qian-Qian LIU, Fei CAO. Reproductive traits associated with invasiveness in Conyza sumatrensis . J Syst Evol, 2009, 47(3): 245-254.
[10] Jun-Yi ZHU, Jing-Mei LU. Morphogenesis of inflorescence and floret in Alnus (Betulaceae) . J Syst Evol, 2008, 46(4): 641-650.
[11] Jun WEN, Scott T. BERGGREN, Chung-Hee LEE, Stefanie ICKERT-BOND, Ting-Shuang YI, Ki-Oug YOO, Lei XIE, Joey SHAW, Dan POTTER. Phylogeny and putative hybridization in the subtribe Paranepheliinae (Liabeae, Asteraceae), implications for classification, biogeography,and Andean orogeny . J Syst Evol, 2008, 46(3): 375-390.
[12] Zhi-Yan DU, Yin-Zheng WANG. Significance of RT-PCR expression patterns of CYC-like genes in Oreocharis benthamii (Gesneriaceae) . J Syst Evol, 2008, 46(1): 23-31.
[13] GAO Tian-Gang, LIU Yan. Gymnocoronis, a new naturalized genus of the tribe Eupatorieae, Asteraceae in China . J Syst Evol, 2007, 45(3): 329-332.
[14] LI Wei-Ping, CHEN Gong-Xi. Aster ageratoides var. pendulus W. P. Li & G. X. Chen,   a new variety of Aster (Asteraceae) from Hunan, China . J Syst Evol, 2006, 44(3): 348-350.
[15] QI Yao-Dong, WANG Yin-Zheng. Floral morphogenesis of Wikstroemia delavayi (Thymelaeaceae) and its phylogenetic implication . J Syst Evol, 2002, 40(3): 271-282.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] WENG De-Bao WANG Hai-Feng WENG Jia-Ying. Studies on Flavonoids in the Inflorescence of Celosia argentea L.[J]. Chin Bull Bot, 2000, 17(06): 565 -568 .
[2] Wu Xian-jun;Li Ping;Wang Qian;Li Chao-luan;Huang Rong and Cheng Fa-ling. Preliminary investigation on development of male and female gametophytes in Cycas Panzhihuaensis L. Zhou et S. Y. Yang[J]. Chin Bull Bot, 1995, 12(专辑): 41 -42 .
[3] Pan Qing-kun. The Effect of Crossing on Transfer of Nuclear Materials in Pollen Mother Cells of Rice[J]. Chin Bull Bot, 1984, 2(05): 41 -43 .
[4] Gan Fan-yuan Xu Chen Zheng Guang-zhi. The Physiological Effects of Oligosaccharins on Culture Cells of Carthamus and Panax Notoginseng[J]. Chin Bull Bot, 1995, 12(03): 36 -40 .
[5] XIONG Zi-Xian. Genophyll Theory and Carp Theory[J]. Chin Bull Bot, 1998, 15(03): 73 -76 .
[6] Minghao Li;Wei Chen;Liping Xing;Jin Xiao;Haiyan Wang;Aizhong Cao;Xiue Wang. Establishment of High-efficiency Genetic Transformation System for the Wheat Variety Alondra's[J]. Chin Bull Bot, 2010, 45(04): 466 -471 .
[7] Dahong Li, Dongping Zhang, Dandan Cao, Jiansheng Liang. Research Advances in Plant RACK1 Proteins[J]. Chin Bull Bot, 2011, 46(2): 224 -232 .
[8] Jiang Wu-sheng and Li De-sheng. Twenty Important Plant Science Journals Covered by the Science Citation Index[J]. Chin Bull Bot, 1997, 14(01): 59 -63 .
[9] Xu Gui-fang and Zhang Jing-lan. Studies on RNA Polymerases Isolation Purification Properties and Activity in Cotyledon Segment of Phaseolus radioutus During Dedifferentiation[J]. Chin Bull Bot, 1991, 8(02): 34 -38 .
[10] Wu He-ming;Lu Wei-zhong;She Jian-ming and Zhou Han-yang. Embryo Development Following Hybridization Between Lycopersicon esculentum and L. peruvianum[J]. Chin Bull Bot, 1990, 7(01): 48 -52 .