+ Site Statistics
PDF Full Text:
+ Live Traffic Content

+ Translate

+ Follow Us

Follow on FacebookFollow on Facebook

Follow on TwitterFollow on Twitter

Follow on Google+Follow on Google+

Follow on LinkedInFollow on LinkedIn

+ Subscribe to Site Feeds

EurekaMag Most Shared ContentMost Shared

EurekaMag PDF Full Text ContentPDF Full Text

+ Request PDF Full Text

EurekaMag Request PDF Full TextRequest PDF Full Text

Attributes of individual flowers of Brassica napus L. are affected by defoliation but not by intraspecific competition

, : Attributes of individual flowers of Brassica napus L. are affected by defoliation but not by intraspecific competition. Annals of Botany 88(1): 111-117

To investigate the effect of intraspecific competition on flowering in Brassica napus'Westar , a series of 30 pots was established that spanned a range of one-96 plants per pot. In each pot, the following attributes of individual flowers were quantified: petal length; petal width; stamen length; pistil length; pollen production; diameter of pollen grains; and nectar production. Certain plants contained a transgenic marker that enabled the vigour of their pollen to be quantified by screening the progeny from post-pollination trials against conventional male competitors. Plant size was strongly affected by plant density; plants in the lowest density pots comprised ten-times more dry biomass than individuals in the highest density pots. However, none of the attributes of individual flowers varied with density. In contrast, the number of flowers per plant declined rapidly with density. In the face of resource scarcity, the plants apparently conserved flower size rather than flower number. There was no difference in the response to density between transgenic and conventional plants, but transgenic plants obtained more fertilizations than expected in post-pollination competition against conventional competitors. A separate experiment demonstrated that B. napus is, nevertheless, capable of plasticity in certain flower attributes (petal size, stamen length) in response to defoliation. Explanations for the stability of flower size relative to flower number are discussed. Copyright 2001 Annals of Botany Company.

Accession: 003655375 PDF Full Text: Upload

Submit PDF Full Text of Accession 003655375

No spam - Every submission is manually reviewed

Select a file (≤5MB):

Close Close

Other Research

Meeting of the societe de psychopathologie et d hygiene mentale de dakar psycho pathology and mental hygiene society of dakar dakar abidjan south africa december 13 1966 symposium

National peer review guidelines move forward

The role of 2-hydroxypropanal in the biosynthesis of 2,5-dimethyl-4-hydroxy-2H-furan-3-one in strawberry callus cultures: 2-Hydroxypropanal was synthesized utilizing a new approach via the Curtius rearrangement, which has the great advantage that the only co-product is ammonium chloride. 2-Hydroxypropanal was, without isolation, fed in situ to strawberry callus cultu...

Analysis of straying variation in Alaskan hatchery chinook salmon following transplantation: In 1976 chinook salmon (Oncorhynchus tshawytscha) gametes from the Chickamin and Unuk rivers in southeastern Alaska were transplanted 250 km to establish hatchery runs at Little Port Walter (LPW), Baranof Island. From 1977 to 1989, 1 862 058 marke...

Developmental studies in Ptychosperma (Palmae). I. The inflorescence and the flower cluster

Plastic embedding of zoological specimens

The special milk program for children

Mikrofauna der Kreideschichten des westlichen bayer. Waldes und des Gebietes um Regensburg.

Wood treating process and composition: The wood impregnating and dehydrating composition comprises tars and creosotes with a material consisting of one of the following: (1) ca. 5% by weight of water-miscible polyhydric alcohols having 2-6 hydroxyl groups; (2) ca. 2% by weight of solut...

Geographical distribution & density of phlebotamine sandflies in Surat district, Gujarat: Sixteen species of sand flies some are vectors of leishmaniasis and sand fly fever were recorded between July 1980 and June 1981 in Surat district, Gujarat State, India, with new records of Phlebotomus colabaensis (Young and Chalam), Sergentomyia...

Thinning of Emory oak coppice: Effects on growth, yield, and harvesting cycles: Effects of stump diameter and thinning treatments at different ages of coppice are described in terms of growth and yield of Emory oak (Quercus emoryi) sprouts over a 5-year period. Growth and yield of residual sprouts depend largely on the number...

Intermediate for the synthesis of prostaglandins: An enantiomerically enriched compound of formula 1, ##STR1## wherein Ar is phenyl optionally substituted with one or more groups selected from haloalkyl, alkyl and halide. This compound can be isolated in crystalline form, and used in the preparat...

Early Pleistocene fish fossils from the Uroin quarry

Nonprotein bound zinc npb zinc is elevated in chronic renal disease and decreases after hemodialysis

HERBICIDE ADVISOR: a decision support system to optimise atrazine and chlorsulfuron activity and crop safety