Details

Autor(en) / Beteiligte

• Brewster, Clare
• Hayes, Felicity
• Fenner, Nathalie

Titel

Ozone Tolerance Found in Aegilops tauschii and Primary Synthetic Hexaploid Wheat

Ist Teil von

• Plants (Basel), 2019-06, Vol.8 (7), p.195

Ort / Verlag

Switzerland: MDPI AG

Erscheinungsjahr

2019

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• Modern wheat cultivars are increasingly sensitive to ground level ozone, with 7-10% mean yield reductions in the northern hemisphere. In this study, three of the genome donors of bread wheat, (AA), (AABB), and (DD) along with a modern wheat cultivar ( 'Skyfall'), a 1970s cultivar ( 'Maris Dove'), and a line of primary Synthetic Hexaploid Wheat were grown in 6 L pots of sandy loam soil in solardomes (Bangor, North Wales) and exposed to low (30 ppb), medium (55 ppb), and high (110 ppb) levels of ozone over 3 months. Measurements were made at harvest of shoot biomass and grain yield. appeared ozone tolerant with no significant effects of ozone on shoot biomass, seed head biomass, or 1000 grain + husk weight even under high ozone levels. In comparison, had a significant reduction in 1000 grain + husk weight, especially under high ozone (-26%). The older cultivar, 'Maris Dove', had a significant reduction in seed head biomass (-9%) and 1000 grain weight (-11%) but was less sensitive than the more recent cultivar 'Skyfall', which had a highly significant reduction in its seed head biomass (-21%) and 1000 grain weight (-27%) under high ozone. Notably, the line of primary Synthetic Hexaploid Wheat was ozone tolerant, with no effect on total seed head biomass (-1%) and only a 5% reduction in 1000 grain weight under high ozone levels. The potential use of synthetic wheat in breeding ozone tolerant wheat is discussed.