scholarly journals Effect of water deficit on proline accumulation, protein and chlorophyll content during flowering and seed formation in winter rape (Brassica napus L. var. oleifera)

2013 ◽  
Vol 38 (1) ◽  
pp. 11-21 ◽  
Author(s):  
Stanisław Flasiński ◽  
Janina Rogozińska
Keyword(s):  
Brassica Napus ◽  
Protein Content ◽  
Chlorophyll Content ◽  
Water Deficit ◽  
Proline Accumulation ◽  
Metabolic Responses ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Seed Formation ◽  
Effect Of Water

Water deficit affecting winter rape plants during flowering and seed formation caused metabolic responses characteristic for drought. Proline accumulation took place in the leaves, the inflorescences and in the siliques. Protein content during flowering and seed formation was reduced in all rape organs except leaves in the latter stage. The decrease of chlorophyll content in the leaves was greater during the period of seed formation than during flowering.

Effect of varying seeding rates on hybrid and conventional summer rape performance in Manitoba

1992 ◽  
Vol 72 (3) ◽  
pp. 635-641 ◽  
Author(s):  
A. E. Van Deynze ◽  
P. B. E. McVetty ◽  
R. Scarth ◽  
S. R. Rimmer
Keyword(s):  
Protein Content ◽  
Chlorophyll Content ◽  
Seed Yield ◽  
Harvest Index ◽  
Dry Matter ◽  
Oil Content ◽  
Seed Quality ◽  
Seeding Rate ◽  
Seed Formation ◽  
Matter Production

To compare the effects of varying seeding rate on the agronomic performance, phenology and seed quality of hybrid and conventional summer rape cultivars, four hybrid and two conventional summer rape cultivars were seeded at 1.5, 3.0, 4.5, 6.0 and 9.0 kg ha−1 at two locations for 3 yr. The hybrid cultivars were, very importantly, 24% higher yielding and produced 50% more total dry matter than the conventional cultivars. The hybrid cultivars were, on average, 1.3% lower in seed oil content, 1.0% higher in seed protein content and equal in sum of oil and protein in the seed compared with the conventional cultivars. The hybrid cultivars were on average, 1.3 d later to 50% flowering and 1.1 d later to maturity than the average for the conventional cultivars, (i.e., equal or earlier to flowering and maturity than Regent). The hybrid cultivars were also 3.9% lower in harvest index and 1.3 ppm lower in chlorophyll content than the conventional cultivars. In spite of these differences, there were no significant cultivar-by-seeding-rate interactions, indicating that the hybrid and conventional cultivars responded similarly to varying seeding rate. Lodging, days to 50% flowering, days to maturity, harvest index, survival, oil content and protein content displayed significant linear responses to varying seeding rate. Stand at maturity, seed yield and total dry matter production displayed significant linear and quadratic responses to varying seeding rate. Varying seeding rate had no effect on seed formation period, the sum of oil and protein content, or chlorophyll content. A seeding rate of 6 kg ha−1 maximized seed yield for both hybrid and conventional summer rape cultivars.Key words: Brassica napus, canola, seed quality, agronomy, phenology

scholarly journals Varietal Diversity of Seed Glucosinolates Content and its Composition in Japanese Winter Rape (Brassica napus L.).

1995 ◽  
Vol 45 (3) ◽  
pp. 357-364
Author(s):  
Masahiko Ishida ◽  
Yoshinao Okuyama ◽  
Yoshihito Takahata ◽  
Norihiko Kaizuma
Keyword(s):  
Brassica Napus ◽  
Varietal Diversity ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Seed Glucosinolates

scholarly journals DOUBLE CROPPING WINTER RAPESEED AND GRAIN SORGHUM

1986 ◽  
Vol 66 (3) ◽  
pp. 425-430 ◽  
Author(s):  
R. R. DUNCAN ◽  
C. S. HOVELAND
Keyword(s):  
Glycine Max ◽  
Brassica Napus ◽  
Cropping System ◽  
Grain Sorghum ◽  
Winter Rape ◽  
Brassica Napus L ◽  
Double Cropping ◽  
Glycine Max L ◽  
Winter Rapeseed ◽  
Sorghum Bicolor L

Since rainfall generally exceeds 500 mm during the winter months and soil erosion is a problem in the southern U.S.A., a cover crop is essential to reduce soil losses. Continuous cultivation of a crop on the same land also provides the opportunity for pest problems to develop. A winter rapeseed (Brassica napus L.)-grain sorghum (Sorghum bicolor (L). Moench.) double-cropping system was investigated in the field from 1981 to 1984. Conventional tillage (CT) and no-till (NT) systems were used for both crops. Gullivar rape was planted in October and harvested in June. Winter rapeseed yields averaged 2.87 t ha−1 on CT plots in 1982. Averaged over 1983 and 1984, rape yields were 1.66 and 0.73 t ha−1 on CT and NT plots, respectively. However, the seeding method biased the rapeseed performance. Problems were encountered with winter weed control and pod shattering in the winter rape plots. Two sorghum hybrids, R. C. Young Oro Txtra and Funks G-550, were planted in June and harvested in October. Grain yields were not significantly different between hybrids (Oro 5.69 t ha−1, Funk 5.67 t ha−1) or between tillage systems (CT 5.59 t ha−1, NT 5.78 t ha−1). Grain yield differences were noted for year × hybrid × tillage interactions. Rape was a weed problem in the sorghum plots. The winter rape-sorghum double-cropping system offers an alternative to current winter small grains-sorghum/soybean (Glycine max (L.) Merr.) or winter annual legume-sorghum/soybean (Glycine max (L.) Merr.) systems; however, markets for the winter rapeseed and production economic analyses are needed prior to adoption of the system. Additional winter rapeseed research is needed to evaluate yields properly under NT conditions.Key words: Sorghum bicolor (L.) Moench, Brassica napus L., conservation tillage, multiple cropping, sorghum, rapeseed

Species and varietal differences in the proteins of rapeseed

1969 ◽  
Vol 47 (5) ◽  
pp. 679-685 ◽  
Author(s):  
A. J. Finlayson ◽  
R. S. Bhatty ◽  
C. M. Christ
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Brassica Napus ◽  
Amino Acid Composition ◽  
Protein Content ◽  
Acid Composition ◽  
Brassica Campestris ◽  
Sulfur Deficiency ◽  
Brassica Napus L ◽  
Sulfur Containing

Two proteins, previously described by the authors as BI (S020, buffer 12 S) and AIVS (S020, w 1.7 S) have been isolated from eight varieties of rapeseed belonging to Brassica campestris L. and Brassica napus L. species. These proteins have similar chromatographic and electrophoretic characteristics but differ in amino acid composition, particularly with regard to the sulfur-containing amino acids. One of the rapeseed samples was obtained from plants grown on sulfur-deficient soil. The sulfur deficiency produced, in the mature seed, a much reduced protein content and appeared to affect the structure of the protein BI.

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