Clonal behaviour in closely related plants

Krahulec, Frantiŝek

doi:10.1007/bf02803801

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Again as vegetative reproduction is so much common in Rhododendrons, the hybrids and polyploidy can be maintain through vegetative reproduction (Herben et al 2017), consequently maintains the variability. Several studies agree with the general statement that asexual reproduction is frequent for plants in adverse environments (Chiariello & Gulmon 1991;Kudo 1991;Krahulec 1994;Chambers 1995). Future detailed investigation is needed in R. lepidotum species complex to verify the intraspecific variability.…”

Section: Resultssupporting

confidence: 77%

Morpho-plasticity in Rhododendron lepidotum Wall. ex G. Don (Ericaceae) along altitudinal gradients and comments on the names used under the species complex

Singh¹,

Maity²

2018

Pleione

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Rhododendron lepidotum Wall. ex G. Don (Ericaceae) is one of the dominant species of the genus in the Himalayas, having a wide distributional range from Pakistan, India, Nepal, China and Bhutan to Myanmar. Throughout its distributional range the species experiences widely variable eco-climatic conditions and thus different morpho-forms are prevalent. A quick search reveals that about 12 names are available under this species complex, reflecting its variability in morphological characters. Presently, a study has been conducted to reassess its morphological variability among the different populations both in the field and through the examination of specimens at different Indian and foreign herbaria. Several important parameters, both vegetative and reproductive were identified and examined to test the faithfulness of these characters of diagnostic value. PCA and UPGMA analysis were also performed to confirm the findings. Relevant literatures were critically examined to understand the reliability of different names published under the species complex. Present study recognized three well defined 'morphoforms and has been compared for better understanding. Apparent reliability in diagnostic features of the presently recognized Form I is corroborative with R. salignum Hook.f. The status of the taxa Rhododendron lepidotum Wall. ex G. Don, R. salignum Hook.f., R. obovatum Hook. f., R. elaeagnoides Hook. f., R. lepidotum var. elaeagnoides (Hook. f.) Franch., R. sinolepidotum Balf..f., R. cremnastes Balf. f. & Farrer, R. lepidotum var. album H.H. Davidian, R. lepidotum var. minutiforme H.H. Davidian, R. lepidotum subsp. salignum (Hook. f.) Pradhan & Lachungpa and R. lepidotum subsp. obovatum (Hook. f.) Pradhan & Lachungpa are discussed and their morpho-plasticity are addressed. Only two names R. lepidotum Wall. ex G. Don subsp. lepidotum and R. lepidotum Wall. ex G. Don subsp. salignum (Hook. f.) are accepted. All other names are considered as synonyms under these two taxa as also advocated by some other previous authors.

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Section: Resultssupporting

confidence: 77%

Morpho-plasticity in Rhododendron lepidotum Wall. ex G. Don (Ericaceae) along altitudinal gradients and comments on the names used under the species complex

Singh¹,

Maity²

2018

Pleione

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“…Several traits, such as lateral spread, connection time, spacer length and multiplication potential, can also be affected by scale and grain of heterogeneity (Oborny 1994). Moreover, it is difficult to judge if the occurrence of various traits is a result of adaptations to particular habitats or whether it reflects evolutionary processes (Krahulec 1994), or possibly both. This is a well known and challenging problem of our (in)ability to disentangle processes operating on ecological (short-term) and evolutionary (long-term) scales.…”

Section: Discussionmentioning

confidence: 99%

Patterns of functional clonal traits and clonal growth modes in contrasting grasslands in the central Apennines, Italy

Halassy

Campetella

Canullo

et al. 2005

J Vegetation Science

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Abstract. Aim: Patterns of plant functional traits related to clonality (clonal growth modes; CGM) in plant communities were studied and hypotheses on the importance of the selected traits in plant communities supported by soils differing in moisture and nutrient status were tested. Material and Methods: Selected plant functional traits, such as the position of the mother‐daughter plants connections, length of spacers, frequency of multiplication, persistency of ramets connections, presence of storage organs and bud protection were studied in two contrasting plant communities (xeric and mesic abandoned pastures) typical of central Apennines, Italy. Results and Discussion: Clonality was shown to be of great importance in both mesic and xeric grasslands. The major differences between the two communities were due to the dominant CGMs: turf graminoids (having effective protection of growth meristems in dense tussocks) dominated xeric grasslands, while rhizomatous graminoids (typical of competitive resource‐rich environments) dominated mesic grasslands. Below‐ground CGOs (clonal growth organs), shorter spacers, higher multiplication potential, permanent ramet connection, large bud bank and increased importance of bud protection were found to be of importance in water stressed xeric grassland. Contrary to our expectations, the mesic (less stressed) grasslands have the higher number of clonal plants possessing storage organs.

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“…Several studies have shown that within and between closely related species the importance of clonal and sexual reproduction can vary among habitats (e.g. Turkington, 1985;Sutherland and Vickery, 1988;Sto Ècklin, 1992Sto Ècklin, , 1999Eckert and Barrett, 1993;Krahulec, 1994). Variation in life-history traits among individuals or different taxa of clonal species may be a result of selection pressure on genetic trade-offs exerted by biotic and abiotic factors in contrasting habitats (Prati and Schmid, 2000), or may result from phenotypic variation (plasticity), particularly common for morphological traits in clonal plants (de Kroon and van Groenendael, 1990).…”

Section: Introductionmentioning

confidence: 99%

Sexual and Vegetative Reproduction of Hieracium pilosella L. under Competition and Disturbance: a Grid-based Simulation Model

Winkler¹

2002

Annals of Botany

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We used a spatially explicit simulation model to examine the relative importance of vegetative and sexual reproduction in Hieracium pilosella L. Based on an understanding of the complex life cycle of this species and on data from in situ population dynamics in a calcareous grassland in NW Switzerland, we simulated growth and the relative contribution of clonal reproduction by stolons and reproduction by seeds across a gradient of increasing soil fertility. Competition by a clonal grass resulted in nearly complete exclusion of H. pilosella from the more fertile part of the simulation plot. Under low soil fertility, when grass could not survive, H. pilosella largely persisted by vegetatively produced rosettes. This pattern of a sharp separation of both species was shifted slightly in favour of H. pilosella by introducing random disturbances. Only by adding: (1) long-distance seed dispersal, and (2) facilitation of seedling establishment in the vicinity of grass tussocks in vegetation gaps was a more realistic representation of field observations realised, with rosettes of H. pilosella grown from seeds occasionally distributed within dense grass vegetation. Phenotypic plasticity of stolon length was a decisive factor for the maintenance of H. pilosella populations. We conclude that a mixed strategy of clonal growth and reproduction by seeds in H. pilosella is necessary to maintain populations of this species in the presence of high interspecific competition and a shortage of open space.

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Clonal behaviour in closely related plants

Cited by 11 publications

References 20 publications

Morpho-plasticity in Rhododendron lepidotum Wall. ex G. Don (Ericaceae) along altitudinal gradients and comments on the names used under the species complex

Morpho-plasticity in Rhododendron lepidotum Wall. ex G. Don (Ericaceae) along altitudinal gradients and comments on the names used under the species complex

Patterns of functional clonal traits and clonal growth modes in contrasting grasslands in the central Apennines, Italy

Sexual and Vegetative Reproduction of Hieracium pilosella L. under Competition and Disturbance: a Grid-based Simulation Model

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