"Clutch Size" in Buttercups

Johnson, Michael P.; Cook, Stanton A.

doi:10.1086/282554

Cited by 56 publications

(21 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present study revealed that the plants growing at low altitudes are comparatively taller and produce more number of leaves. Our results are supported and confirmed by the observations of Johnson and Cook [28], Hickman [29] and Bresson et al [30] who have also observed a reduction in length, breadth and area of leaves with an increase in altitude. However, in this study, leaf dimensions show a contrasting trend being greater in low altitude populations in case of A. bracteosa and in high altitude populations in case of A. parviflora.…”

Section: Reproductive Allocation At Floweringsupporting

confidence: 92%

Green Options for Imparting Antibacterial Functionality to Cotton Fabrics

A¹,

A²,

M³

et al. 2017

Herb Med

View full text Add to dashboard Cite

Ajuga is a medicinally important genus of the Himalayan region. This study was carried out on the phenotypic variability and reproductive allocation in two species of genus Ajuga, A. bracteosa and A. parviflora growing in variable habitats of Kashmir valley. Our findings clearly displayed significant divergence among sites which reveals a definite impact of altitude on morphological and reproductive features of the species under study. In A. bracteosa the plants growing at low altitudes are comparatively taller and produce more number of leaves, greater leaf dimensions and inflorescence number. But in case of A. parviflora a more or less reverse trend was seen. Principal component analysis (PCA) revealed that the habitat of Kangan and Dachigam proved relatively better for the growth of A. bracteosa and Brinal 2 and Gogaldara for A. parviflora. Maximum resources were allocated to the growth and development of the leaves followed by stem, root tubers and inflorescence in both the species. The reproductive effort was higher (40.48 ± 1.59) for the high altitude Betab valley population in case of A. bracteosa and was lowest for the high altitude Brinal 2 population (45.88 ± 1.37) in case of A. parviflora. The regression analysis revealed a positive correlation between branch length and root length, branch length and apical leaf length in both the species and a negative correlation between branch length and number of branches per plant in both the species. Our results are very useful to introduce the species into cultivation and developing strategies for conservation.

show abstract

Section: Reproductive Allocation At Floweringsupporting

confidence: 92%

Green Options for Imparting Antibacterial Functionality to Cotton Fabrics

A¹,

A²,

M³

et al. 2017

Herb Med

View full text Add to dashboard Cite

show abstract

“…Johnson and Cook (1968) found that the carpel production of the uniovulate Ranunculusfiammula L. is "consistent with the amount of food reserve that can be accumulated by the plant for endosperm production ". Ifthis is true for most uniovulate plants and if all other factors are equal, then we should expect that populations with a low C value and hence a low seed/ovule production should produce more ovules (and therefore more carpels) than those with a high C value.…”

Section: Discussiormentioning

confidence: 77%

Seed production and sex ratio in anemophilous plants

Kaplan¹

1972

Heredity

View full text Add to dashboard Cite

“…The large embryo and large food reserves of the seed make it possible for the seedlings to emerge as a more completely developed plantlet, survive for longer and grow to a more aggressive size in an environment that is starved of resources. Johnson and Cook [9] have reported that since major portion of the weight of a seed is food storage tissue, one may conclude that there is some optimum amount of food reserve which will normally insure the necessary seedling vigor. This probably accounts for the early vigorous start in seedling growth and the species quick establishment in an environment.…”

Section: Discussionmentioning

confidence: 99%

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

Muoghalu¹

2005

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. Seed germination and reproductive strategies of Tithonia diversifolia and Tithonia rotundifolia, two invasive species introduced into Africa from North and Central America, were studied. The aim was to determine the characteristics that make them invasive species in the continent. Tithonia diversifolia is a perennial and polycarpic plant reproducing both sexually and asexually while Tithonia rotundifolia is an annual monocarpic plant reproducing only sexually. The seeds of these species exhibit a period of dormancy before germinating. Tithonia diversifolia produces small sized light and numerous seeds while Tithonia rotundifolia produces larger sized, heavier and fewer seeds. Tithornia rotundifolia allocates a high proportion of of dry matter (41.6 %) and Tithonia diversifolia low proportion (10.5 %) to reproduction. It is concluded that small sized light and numerous seeds produced by Tithonia diversifolia accounts for its wide dispersal and rapid spread in colonized areas. Also its perennial habit and ability to reproduce sexually and vegetatively accounts for the species colonizing and stabilizing fast in new habitats. While the larger heavier seeds and high reproductive effort of Tithonia rotundifolia ensures its early vigorous start in seedling growth, quick establishment, survival for longer and to grow to more aggressive size in an environment that is starved of resources. Seed dormancy exhibited by the two species ensures they survive adverse conditions in their environment as seeds and germinate only when the environmental conditions favour the survival of their seedlings.

show abstract

"Clutch Size" in Buttercups

Cited by 56 publications

References 0 publications

Green Options for Imparting Antibacterial Functionality to Cotton Fabrics

Green Options for Imparting Antibacterial Functionality to Cotton Fabrics

Seed production and sex ratio in anemophilous plants

Seed Germination and Reproductive Strategies of Tithonia Diversifolia (Hemsl .) Gray and Tithonia Rotundifolia (P.M) Blake

Contact Info

Product

Resources

About