Growth, senescence and water use efficiency of spring oilseed rape (Brassica napus L. cv. Mozart) grown in a factorial combination of nitrogen supply and elevated CO2

2011 ◽  
Vol 72 (2) ◽  
pp. 284-296 ◽  
Author(s):  
J. Franzaring ◽  
S. Weller ◽  
I. Schmid ◽  
A. Fangmeier
Keyword(s):  
Brassica Napus ◽  
Water Use Efficiency ◽  
Elevated Co2 ◽  
Water Use ◽  
Oilseed Rape ◽  
Nitrogen Supply ◽  
Brassica Napus L ◽  
Factorial Combination ◽  
Use Efficiency

scholarly journals Canopy application of film antitranspirants over the reproductive phase enhances yield and yield-related physiological traits of water-stressed oilseed rape (Brassica napus)

2016 ◽  
Vol 67 (7) ◽  
pp. 751 ◽  
Author(s):  
Michele Faralli ◽  
Ivan G. Grove ◽  
Martin C. Hare ◽  
Roger D. Boyle ◽  
Kevin S. Williams ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Water Use Efficiency ◽  
Water Deficit ◽  
Water Use ◽  
Oilseed Rape ◽  
Dry Matter ◽  
Crop Management ◽  
Management Tool ◽  
Film Forming ◽  
Use Efficiency

Oilseed rape (Brassica napus L.) yield is strongly decreased by water deficit, and crop-management solutions are urgently required considering the emerging difficulties in breeding for drought-tolerant varieties. Film-forming antitranspirants (polymers) are agrochemicals that, applied to the crop canopy, mechanically block the stomata and decrease canopy transpiration. In this study, the drought-protection efficacy of an adaxial-surface application at the flowering stage of two film-forming treatments (poly-1-p-menthene and di-1-p-menthene) was investigated in pot-grown, droughted oilseed rape over two glasshouse experiments. Over the drought period, the two compounds reduced leaf stomatal conductance (P < 0.001), and as the soil moisture deficit increased, they sustained carbon assimilation and improved water-use efficiency with differing efficacy. Following the antitranspirant treatments, ABA concentration in leaves and reproductive organs was severely reduced and this was accompanied by significant improvements in leaf and flower–pod water potential. Drought significantly decreased the seed dry matter production of oilseed rape plants, by 39% on average. The treatments significantly increased seed dry matter by 13% (poly-1-p-menthene) and 17% (di-1-p-menthene), on average, compared with the unsprayed droughted plants, as a result of a significant increase in number of pods per plant, by 11% and 13%, respectively. The results suggest that film-forming compounds may be a useful crop-management tool to avoid severe drought-induced yield losses in oilseed rape by improving water-use efficiency and plant water status, thus alleviating ABA signalling under water deficit.

scholarly journals WATER USE EFFICIENCY AND YIELD-DEPENDENCES FOR CANOLA (Brassica napus, L.) UNDER IRRIGATION

2016 ◽  
Vol 62 (1) ◽  
Author(s):  
Milena MOTEVA ◽  
Velibor SPALEVIC ◽  
Antoaneta GIGOVA ◽  
Vjekoslav TANASKOVIK
Keyword(s):  
Brassica Napus ◽  
Water Use Efficiency ◽  
Water Use ◽  
Brassica Napus L ◽  
Use Efficiency
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