Germination Polymorphism in Sympatric Populations of Calotropis Procera

Amritphale, Dilip; Gupta, J. C.; Iyengar, Shamanta

doi:10.2307/3544796

Cited by 9 publications

(4 citation statements)

References 3 publications

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“…Photoblastic response. A neutral photoblastic response under the temperature regime was obtained in accordance with results obtained by other authors (Sen et al 1968, Amritphale et al 1984, Oliveira-Bento et al 2013, Taghvaei et al 2015. Moreover, Leal et al (2013) Here, for C. procera, we report that germination percentage for seeds incubated under complete darkness was higher at temperatures below 30 °C, though with no significant differences compared with seeds incubated under a 12-h photoperiod.…”

Section: O N L I N E F I R S Tsupporting

confidence: 92%

“…Contrary to these species, data obtained for C. procera show high germination percentages for fresh seeds during the first seven days after sowing. However, in a study conducted in India, Amritphale et al (1984) found that one of three sympatric populations showed dormancy. This may be linked to the fact that this population had the lowest seed size and could be explained by a maternal effect induced by different environmental conditions (Campbell et al 2015).…”

Section: Discussionmentioning

confidence: 96%

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Germination of the exotic Calotropis procera (Aiton) W.T. (Apocynaceae) in Mexico

Navarrete-Sauza

Rojas-Aréchiga

2023

Bot. Sci.

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Background: Seed germination strategies are important for exotic species to identify the factors that control seed germination and establishment. Questions and /or Hypotheses: Temperature and light germination requirements for seeds of Calotropis procera do not change neither in its native regions nor in lands where it is exotic. Calotropis procera show germination traits that may increase their probability of colonization. Studied species: Calotropis procera is a perennial plant native to some desertic areas in Asia and Africa and now naturalized in America. Study site and dates: Mature fruits were collected in Oaxaca in September 2019 to test germination parameters. The last experiment was conducted in September 2021. Methods: We determined the effect of different temperatures, photoblastic response, and loss of viability of seeds kept at laboratory conditions for two years. We performed several sowings under controlled conditions and achieved germinability, t50 and the time to germinate. Results: Seeds were non-dormant, neutral photoblastic and did not lose viability after two years of dry storage. Temperature affected germinability and t50. Optimum germination temperature was 30 °C with no germination above 40 °C. Conclusions: Germination requirements of seeds of Calotropis procera studied were similar to those reported worldwide. Though seed germination was affected by maximum mean temperatures, seeds germinated fast and at high percentages under a wide range of temperatures, which together with other attributes, may confer C. procera great chances for successful colonization.

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Section: O N L I N E F I R S Tsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 96%

Germination of the exotic Calotropis procera (Aiton) W.T. (Apocynaceae) in Mexico

Navarrete-Sauza

Rojas-Aréchiga

2023

Bot. Sci.

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“…C. procera is more abundant and widely distributed than C. gigantea in this region and serves as the principal host plant species. Bhatnagar (1975) and Amritphale et al (1984) reported a number of variations in floral structure in C. procera. In a preliminary study, the present workers observed two morphs based on fruit characteristics in this species with a given plant producing only one type of fruit.…”

Section: Introductionmentioning

confidence: 97%

Influence of fruit traits on the infestation of Dacus persicus in two fruit morphs of Calotropis procera

Sharma

Amritphale

2008

Arthropod-Plant Interactions

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The larvae of Dacus (Leptoxyda) persicus (aak fruit fly) are key predispersal seed predators in Calotropis procera (Asclepiadaceae). Based on fruit characteristics, two morphs are distinguishable in C. procera viz., the softfruited morph (SF morph) and the hard-fruited morph (HF morph). The work reported here examined whether the fruit characteristics influenced the infestation by the aak fruit fly and, if so, what mechanism(s) were operative. Fruits in the SF morph were significantly more acceptable to the aak fruit fly than those of the HF morph irrespective of their size class and availability or fly population density. A general ranking of fruit acceptability for oviposition by the aak fruit fly within the fruit size class was: size class III C size class II [ size class I and IV. The negative relationship between fruit infestation and pericarp toughness, which is suggestive of trade-offs between the fly's oviposition obligation and energy/time (predation risk) constraint, was found to correlate with the requirement of greater force to puncture the pericarp in the hard fruits. Lower penetrability of the pericarp in the hard fruits appeared to be primarily due to the thickness of pericarp and secondarily on account of the thickened walls of endocarpic-mesocarpic cells in the inner pericarpic layer. The present data point to the existence of two fruit morphs in C. procera differing in the acceptability of fruits for oviposition by the aak fruit fly primarily on account of toughness and internal structure of the pericarp.

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“…Children differ genetically from their parents (chromosome range 2n = 22; [3]. A study of C. procera in its natural environment noted polymorphism in metamorphosis, etc., as well as in flower morphology [4,5]. The species is widely distributed and may be found from Africa north of the equator to the Arabian Peninsula, India, Mexico and America.…”

Section: Introductionmentioning

confidence: 99%

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2022

MINAR Journal

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A general and accurate morphological study was carried out for the species Calotropis procera which belongs to the family Asclepiadaceae. The research included the phenotypic characteristics of the root, stem and leaves the leaves were studied morphologically and anatomically, Flowers, fruits and seeds, as well as the geographical distribution of the genus were studied also. In general, there are no previous taxonomic study of this genus under consideration, according to the available sources and it is the first one has been done in Iraq, perhaps Because of its low prevalence previously, where it was recently noticed its spread in last two to three years ago.

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Germination Polymorphism in Sympatric Populations of Calotropis Procera

Cited by 9 publications

References 3 publications

Germination of the exotic Calotropis procera (Aiton) W.T. (Apocynaceae) in Mexico

Germination of the exotic Calotropis procera (Aiton) W.T. (Apocynaceae) in Mexico

Influence of fruit traits on the infestation of Dacus persicus in two fruit morphs of Calotropis procera

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