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2014 | 36 | 11 |

Tytuł artykułu

Rising atmospheric CO2 may affect oil quality and seed yield of sunflower (Helianthus annus L.)

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
The impact of rising atmospheric CO₂ on crop productivity and quality is very important for global food and nutritional security under the changing climatic scenario. A study was conducted to investigate the effect of elevated CO₂ on seed oil quality and yield in a sunflower hybrid DRSH 1 and variety DRSF 113, raised inside open top chambers and exposed to elevated CO₂ (550 ± 50 µl⁻¹). Elevated CO₂ exposure significantly influenced the rate of photosynthesis, seed yield and the quality traits in both hybrid and variety. Plants grown under elevated CO₂ concentration showed 61–68 % gain in biomass and 35–46 % increase in seed yield of both the genotypes, but mineral nutrient and protein concentration decreased in the seeds. The reduction in seed protein was up to 13 %, while macro and micronutrients decreased drastically (up to 43 % Na in hybrid seeds) under elevated CO₂ treatment. However, oil content increased significantly in DRSF 113 (15 %). Carbohydrate seed reserves increased with similar magnitudes in both the genotypes under elevated CO₂ treatment (13 %). Fatty acid composition in seed oil contained higher proportion of unsaturated fatty acids (oleic and linoleic acid) under elevated CO₂ treatment, which is a desirable change in oil quality for human consumption. These findings conclude that rising atmospheric CO₂ in changing future climate can enhance biomass production and seed yield in sunflower and alter their seed oil quality in terms of increased concentration of unsaturated fatty acids compared with saturated fatty acids and lower seed proteins and mineral nutrients.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

36

Numer

11

Opis fizyczny

p.2853-2861,fig.,ref.

Twórcy

autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India
autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India
autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India
autor
  • Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi, 110012, India

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

bwmeta1.element.agro-382418a1-128b-4652-8a76-183b9cc05858
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