Research Paper

Structure and development of the secondary xylem in ten species of Passiflora from Taiwan

Sheng-Zehn Yang, Po-Hao Chen, Jian-Jhong Chen

Published on: 26 March 2025

Page: 252 - 261

DOI: 10.6165/tai.2025.70.252

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    Abstract

    Studies on secondary growth of the genus Passiflora (Passifloraceae) in Taiwan are scarce. This study aimed to investigate the patterns of cambial variants in 10 Passiflora species. Stem diameters were measured to determine structural and developmental differences in the secondary xylem of Passiflora species. Cambial variants observed included irregular conformations, furrowed xylem, external secondary vascular cylinders, and successive cambia. An external secondary vascular cylinder was evaluated to distinguish Passiflora coccinea from Passiflora vitifolia. Passiflora edulis stems were thick and cylindrical, with two rings of successive cambia. Passiflora suberosa subsp. litoralis had fissured xylems with shallow phloem wedges in small stems and exhibited circular and cylindrical structures with more secondary rays in large stems. Passiflora laurifolia and Passiflora quadrangularis had secretory tissues around the cortex, where the stem of the former was regular in conformation, and that of the latter was four-ridged. Among the species studied, P. quadrangularis exhibited aggregated rays in stem xylem cylinders. All investigated species had a diffuse-porous secondary xylem and vasicentric paratracheal parenchyma, except for P. suberosa litoralis, which had semi-ring-porous and indistinct growing rings. The cambial variants of the genus Passiflora described in the present study could increase the significances of this study in relation to ecological and functional contexts and it will provide the primary information for future morphological studies.

    Keyword: Aggregate rays, external secondary vascular cylinder, interfascicular rays, Passifloraceae, phloem wedge

    Literature Cited

    Acevedo-Rodr?guez, P. 2005 Vines and Climbing Plants of Puerto Rico and the Virgin Islands. Contributions from the United States National Herbarium Volume 51: 1–483. Dept. Bot. Natl Mus. Natl Hist. Washington, DC.

    Angyalossy, V., Pace, M.R., Lima, A.C. 2015 Liana Anatomy: A broad perspective on structural evolution of the vascular system. In: Schnitzer, S.A., Bongers, F., Burnham, R.J., Putz, F.E. (eds.) Ecology of Lianas. pp. 253–287. Wiley Blackwell, West Sussex, U.K.
    DOI: 10.1002/9781118392409.ch19View Article Google Scholar

    Angyalossy, V., Pace, M.R., Evert, R.F., Marcati, C.R., Oskolski, A.A., Terrazas, T., Kotina, E., Lens, F., Mazzoni-Viveiros, S.C., Angeles, G., Machado, S.R., Crivellaro, A., Rao, K.S., Junikka, L., Nikolaeva, N., Baas, P. 2016 IAWA List of Microscopic Bark Features. IAWA J. 37(4): 517–615.
    DOI: 10.1163/22941932-20160151View Article Google Scholar

    Ayensu, E.S., Stern, W.L. 1964 Systematic anatomy and ontogeny of the stem in Passifloraceae. Contributions from the United States National Herbarium 34(3): 45–73.

    Carlquist, S. 2001 Cambial Variants (Anomalous Secondary Growth). In: Carlquist, S. (ed.) Comparative Wood Anatomy, 2nd edn. pp 271–295. Systematic, Ecological and Evolutionary Aspects of Dicotyledon Wood. Spinger-Verlag Press, Berlin, Germany.

    Chen, W.C., Chung, A.C., Wang, C. C., Yang, S. Z., Chen, P. H. 2022 Passiflora (Passifloraceae) in Taiwan. Phytotaxa 538(1): 79–83.
    DOI: 10.11646/phytotaxa.538.1.7View Article Google Scholar

    Ferreira, T., Rasband, W. 2011 The imageJ user guide version. 1.44. http://rsbweb.nih.gov/ij/docs/user-guide.pdf

    Feuillet, C., Acevedo-Rodr?guez, P. 2020 Guide to the genera of lianas and climbing plants in the Neotropics, Passifloraceae. In: Acevedo-Rodr?guez, P. et al. (2015 onwards). Lianas and climbing plants of the Neotropics. https://naturalhistory.si.edu/research/botany/research/lianas-and-climbing-plants-neotropics

    Gentry, A.H. 1981 Distributional patterns and an additional species of the Passiflora vitiflora complex: Amazonian species diversity due to edaphically differentiated communities. Pt. Syst. Evol. 137: 95–105.
    DOI: 10.1007/BF00983208View Article Google Scholar

    Govaerts, R., Nic Lughadha, E., Black, N., Turner, R., Paton, A. 2021 The world checklist of vascular plants, a continuously updated resource for exploring global plant diversity. Sci. Data 8(1): 215.
    DOI: 10.1038/s41597-021-00997-6View Article Google Scholar

    Isnard, S., Rowe, N., Speck, T. 2003 Growth habit and mechanical architecture of the sand dune?adapted climber Clematis flammula L. var. maritima L. Ann. Bot. 91(4): 407–417.
    DOI: 10.1093/aob/mcg044View Article Google Scholar

    Isnard, S., Silk, W.K. 2009 Moving with climbing plants from Charles Darwin’s time into the 21st century. Am. J. Bot. 96(7): 1205–1221.
    DOI: 10.3732/ajb.0900045View Article Google Scholar

    IAWA Committee on Nomenclature. 1964 Multilingual Glossary of Terms Used in Wood Anatomy. Verlagsbuchanstalt Konkordia, Winterthur, Switzerland. p. 186.

    Kao, M.T. 1993 Passifloraceae. In: Huang, T.-C. et al. (eds.), Flora of Taiwan, 2nd ed. 3: 837–841. Editorial Committee, Dept. Bot., NTU, Taipei, Taiwan.

    Ocampo, J., Coppens d’Eeckenbrugge, G. 2017 Morphological characterization in the genus Passiflora L.: an approach to understanding its complex variability. Plant Syst. Evol. 303(4): 531–558.
    DOI: 10.1007/s00606-017-1390-2View Article Google Scholar

    Pace, M.R., Lohmann, L.G., Angyalossy, V. 2009 The rise and evolution of the cambial variant in Bignonieae (Bignoniaceae). Evol. Dev. 11(5): 465–479.
    DOI: 10.1111/j.1525-142X.2009.00355.xView Article Google Scholar

    Rajput, K.S., Baijnath, H. 2016 Stem anatomy of some species of Passiflora (Passifloraceae). IAWA J. 37(3): 431–443.
    DOI: 10.1163/22941932-20160145View Article Google Scholar

    Rowe, N.P., Speck, T. 1996 Biomechanical characteristics of the ontogeny and growth habit of the tropical liana Condylocarpon guianense (Apocynaceae). Int. J. Plant Sci. 157(4): 406-417.
    DOI: 10.1086/297357View Article Google Scholar

    Rowe, N.P., Speck, T. 2005 Plant growth forms: an ecological and evolutionary perspective. New Phytol. 166: 61–72.
    DOI: 10.1111/j.1469-8137.2004.01309.xView Article Google Scholar

    Wang, Y.Z., Krosnick, S.E., J?rgensen, P.M., Hearn, D. 2007 Passifloraceae. In: Wu, Z.Y., Raven, P.H., Hong, D.Y. (eds.) Flora of China 13: 141–147. Science Press & Missouri Botanical Garden.

    Yang, S.Z., Chen, P.H., Chen C.F. 2021 Stem cambial variants of the Clematis species (Ranunculaceae) in Taiwan. Taiwania 66(4): 526–540.
    DOI: 10.6165/tai.2021.66.526View Article Google Scholar

    Yang, S.Z., Chen, P.H., Chen J.J. 2022 Stem cambial variants of Taiwan lianas. Bot. Stud. 63: 27.
    DOI: 10.1186/s40529-022-00358-5View Article Google Scholar

    Yang, S.Z., Chen, P.H., Chen J.J. 2023 Stem cambial variants of selected Cucurbitaceae plants in Taiwan. Taiwania 68(2): 239?247.
    DOI: 10.6165/tai.2023.68.241View Article Google Scholar