J Syst Evol ›› 2012, Vol. 50 ›› Issue (2): 119-124.doi: 10.1111/j.1759-6831.2011.00175.x

• Research Articles • Previous Articles     Next Articles

Does the relative importance of resource competition and architectural effect in floral variation vary with stages of floral ontogeny?

Chang-Qiu LIU  Shuang-Quan HUANG*   

  1. College of Life Sciences, Wuhan University, Wuhan 430072, China
  • Received:2011-11-02 Online:2011-11-24 Published:2012-02-23

Abstract: Variation in floral allocation within inflorescences has been attributed to resource competition and/or architectural effect. The two hypotheses were extensively studied and both hypotheses were partly supported by previous studies. However, the relative importance of resource competition and architectural effect may vary with stages of floral ontogeny in a species. To detect the effects of ontogenetic stages on floral variation, we manipulated the 6-flowered inflorescences of Adenophora jasionifolia (Campanulaceae) by early, late, and non-thinning flowers. Our results indicated that pollen and ovule production of the remaining flowers were not significantly different between early and late thinning manipulations, suggesting that floral sex allocation was determined far before flowering, in support of the architectural effect hypothesis. Under hand-pollination treatments, early thinning but not late thinning resulted in a significant increase in seed number and seed set of the remaining flowers. Therefore, the increase in seed production of the remaining flowers related to the floral ontogeny. The resource competition for floral allocation was significant under early thinning rather than late thinning manipulation. Our results suggest that studies on floral variation within inflorescences should take into account the stages of floral ontogeny.

Key words: Adenophora jasionifolia, architectural effect, Campanulaceae, floral ontogeny, floral variation, flower thinning time, pollen and ovule number, resource competition.

[1] Mason W. Kulbaba, Ilona C. Clocher, Lawrence D. Harder. Inflorescence characteristics as function-valued traits: Analysis of heritability and selection on architectural effects . J Syst Evol, 2017, 55(6): 559-565.
[2] De-Yuan Hong, Qiang Wang. A new taxonomic system of the Campanulaceae s.s. . J Syst Evol, 2015, 53(3): 203-209.
[3] Somayeh NAGHILOO, Masoumeh KHODAVERDI, Zahra ESMAILLOU, Mohammad Reza DADPOUR, Paula J. RUDALL. Comparative floral development in the tribe Mentheae (Nepetoideae: Lamiaceae) and its bearing on the evolution of floral patterns in asterids . J Syst Evol, 2014, 52(2): 195-214.
[4] Kyeong-Sik CHEON, Ki-Oug YOO. Phylogeny of Hanabusaya (Campanulaceae), a Korean endemic, based on ITS sequences of nuclear ribosomal DNA . J Syst Evol, 2013, 51(6): 704-714.
[5] HONG De-Yuan, PAN Kai-Yu. The Restoration of the Genus Cyclocodon ( Campanulaceae) and Its Evidence from Pollen and Seed-coat . J Syst Evol, 1998, 36(2): 106-110.
[6] Guo Yan-ping, Pan Kai-yu, Ge Song. Sporogenesis and Gametogenesis of Endangered Adenophora lobophylla Hong (Campanulaceae) . J Syst Evol, 1997, 35(4): 293-296.
[7] Hong De-yuan. The Geography of the Campanulaceae: On the Distribution Centres . J Syst Evol, 1995, 33(6): 521-536.
[8] Wang Zheng-tao, Xu Guo-jun. Two New Species of Codonopsis From China . J Syst Evol, 1993, 31(2): 184-187.
[9] Hong De-Yuan, Ma Li-Ming. Systematics of the Genus Cyananthus Wall. ex Royle . J Syst Evol, 1991, 29(1): 25-51.
[10] Hong De-Yuan. Echinocodon Hong, a New Genus of Campanulaceae and Its Systematic Position . J Syst Evol, 1984, 22(3): 181-184.
Full text



[1] Baoda Han;Lixin Li. Seed Storage Proteins and Their Intracellular Transport and Processing[J]. Chin Bull Bot, 2010, 45(04): 492 -505 .
[2] Zhao Hui-Xiang. Induction of Plantlets from Endosperm of “JINFENG” Pear in Vitro[J]. Chin Bull Bot, 1983, 1(02): 38 -39 .
[3] Zhou Guo-xia. Effects of the Cold-resister CR-4 for Defending the Seedling Blight in Early Spring Rice Seedling Culture[J]. Chin Bull Bot, 1994, 11(特辑): 121 -122 .
[4] Xiaojun Xi, Jing Cao, Jinfeng Zhang, Dengrong Zhang. Study on Drought Resistance of Abies concolor[J]. Chin Bull Bot, 2008, 25(06): 722 -727 .
[5] Jing Wang Ting Wang. Molecular Structure, Physiological Function and Evolution of Phytochrome in Higher Plants[J]. Chin Bull Bot, 2007, 24(05): 649 -658 .
[6] Hongfei Zhang Suomin Wang. Advances in Study of Na+ Uptake and Transport in Higher Plants and Na+ Homeostasis in the Cell[J]. Chin Bull Bot, 2007, 24(05): 561 -571 .
[7] Lin Chun-jian. Polar Auxin Transport[J]. Chin Bull Bot, 1996, 13(04): 1 -5 .
[8] LIANG Yu GAO Yu-Bao. Effects of Endophyte Infection on Growth,Development and Stress Resistance of Plants[J]. Chin Bull Bot, 2000, 17(01): 52 -59 .
[9] Hu yu-fan and zhu Jia-nan. New Information on the Coal Series of Gigantopterid[J]. Chin Bull Bot, 1990, 7(04): 49 -50 .
[10] . [J]. Chin Bull Bot, 1996, 13(专辑): 82 .