Density and the commitment of apical meristems to clonal growth and reproduction in Hieracium pilosella

Oecologia ◽  
1985 ◽  
Vol 66 (3) ◽  
pp. 417-422 ◽  
Author(s):  
G. F. Bishop ◽  
A. J. Davy
Keyword(s):  
Clonal Growth ◽  
Apical Meristems ◽  
Hieracium Pilosella ◽  
Growth And Reproduction

Effect of soil moisture and fertilizer application on clonal growth and reproduction in a tristylous weed, Lythrum salicaria

1997 ◽  
Vol 75 (1) ◽  
pp. 46-60 ◽  
Author(s):  
Tarun K. Mal ◽  
Jon Lovett-Doust ◽  
Lesley Lovett-Doust
Keyword(s):  
Soil Moisture ◽  
Clonal Growth ◽  
Spatial Separation ◽  
Field Studies ◽  
Fertilizer Application ◽  
Lythrum Salicaria ◽  
Relative Mass ◽  
Total Length ◽  
Proportional Allocation ◽  
Growth And Reproduction

Clonal growth and reproduction in tristylous Lythrum salicaria L. were examined experimentally, using cloned genotypes of each of the three flower morphs, in field studies involving four moisture and three nutrient treatments. Clonal growth was measured in terms of diameter of clones, number of ramets per clone, and total length of ramets, and an index of reproduction was recorded as the total length of infructescence per clone. Neither clonal growth nor reproduction differed significantly among flower morphs, but both differed significantly as a consequence of both moisture and nutrient treatments. The pattern of seasonal growth indicates that ramet production was restricted mainly to the beginning of the season following vigorous vegetative growth. Although flowering began in June, it was restricted to plants in drier treatments in the water-gradient experiment. Characters intrinsic to tristyly (such as lengths of styles and stamens, and allocation of biomass to stamens and pistil) differed significantly among morphs. Soil moisture levels but not fertilizer treatments significantly affected the size of floral structures and biomass. Although absolute levels of biomass allocation to whole flowers and to attractive structures did not differ significantly among morphs, relative allocation to stamens increased progressively from long morph to mid-morph to short morph, with a corresponding decrease in relative mass of pistil. Although proportional allocation differed significantly among morphs, it was unaffected by moisture treatment, suggesting tight genetic control of herkogamy (spatial separation between anther and stigma). This should maintain the floral polymorphism in different ecological conditions. Key words: Lythrum salicaria, nutrient and water gradients, heterostyly, floral morphometry, floral allocation, clonal growth, sexual reproduction.

The effects of water level on the growth and reproduction of Scirpus maritimus var. paludosus

1981 ◽  
Vol 59 (2) ◽  
pp. 118-121 ◽  
Author(s):  
V. J. Lieffers ◽  
J. M. Shay
Keyword(s):  
Water Level ◽  
Seed Production ◽  
Water Depth ◽  
Clonal Growth ◽  
Water Surface ◽  
Total Biomass ◽  
Canadian Prairies ◽  
Underground Biomass ◽  
Scirpus Maritimus ◽  
Growth And Reproduction

A greenhouse experiment was conducted to examine the effects of water depth on the growth and reproduction of Scirpus maritimus L. Plants grown at or above the water surface had higher shoot survivorship, greater numbers of vegetative tillers, and higher underground biomass, while seed production was small. With increasing water depth plants had taller shoots and greater seed production but total biomass, numbers of vegetative tillers, and underground biomass were reduced. This shift from clonal growth to seed production with increasing water depth is interpreted as a strategy that permits survival of S. maritimus populations through the wet and dry climatic periods of the Canadian prairies.

The influences of density on growth and reproduction in moose Alces alces

2000 ◽  
Vol 6 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Steven H. Ferguson ◽  
Alan R. Bisset ◽  
François Messier
Keyword(s):  
Alces Alces ◽  
Growth And Reproduction

Differentiation of Multiple Shoot Apical Meristems in Mutant Rice with One Embryo Causing Multiple Plumuples

2012 ◽  
Vol 37 (12) ◽  
pp. 2251-2260
Author(s):  
Jing-Yu GUO ◽  
Zhi-Xiong CHEN ◽  
Bing-Yao YANG ◽  
Xin-Fen CHEN ◽  
Xiang-Dong LIU ◽  
...  
Keyword(s):  
Multiple Shoot ◽  
Apical Meristems ◽  
Shoot Apical Meristems

THE EFFECTS OF TEMPERATURE ON THE GROWTH AND REPRODUCTION IN SIMOCEPHALUS HIMALAYENSIS

2010 ◽  
Vol 36 (4) ◽  
pp. 794-805 ◽  
Author(s):  
Xin-Lu SHI ◽  
Cai-Hua QI ◽  
Gui-Jie LIU ◽  
Shuang-Yan BAO ◽  
Xiao-Na HUANG
Keyword(s):  
Effects Of Temperature ◽  
Growth And Reproduction
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