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2015 | 37 | 02 |

Tytuł artykułu

Responses of canola (Brassica napus L.) cultivars under contrasting temperature regimes during early seedling growth stage as revealed by multiple physiological criteria

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
Investigations were carried out to study the responses of canola (Brassica napus) under contrasting temperature regimes (day/night C): 35/30 (high temperature) and 15/10 (low temperature) in comparison with optimal temperature (25/20) at early seedling stage. The results indicated that high temperature inhibited seedling establishment, while low temperature restrained seed germination. Both high and low temperatures showed detrimental effects on seedling growth as revealed by reduced establishment percentage, seedling vigor index, and fresh weight due to accumulated reactive oxygens. The antioxidant enzymes responded to high and low temperature differently. Under high temperature, superoxide dismutase (SOD) and peroxidase (POD) activities reduced, while catalase (CAT) activities increased. Under low temperature, however, SOD activities increased, while POD activities reduced, with CAT activities unchanged. Proline played an important role in temperature stress tolerance and can be used as an indicator for tolerance to unfavorable temperature conditions in canola seedlings. Huayouza 9 showed much stronger tolerance to both high and low temperature compared with other cultivars tested in this study. The full extent of tolerance mechanisms need to be further studied.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

37

Numer

02

Opis fizyczny

Article: 7 [10 p.], fig.,ref.

Twórcy

autor
  • Key Laboratory of Huazhong Crop Physiology, Ecology and Production, College of Plant Science and Technology, Ministry of Agriculture (MOA), Huazhong Agricultural University, No.1 Shizishan Street, Hangshou District, 43070 Wuhan, Hubei, China
  • School of Plant Biology, Faculty of Science and The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, W A 6009, Australia
autor
  • Key Laboratory of Huazhong Crop Physiology, Ecology and Production, College of Plant Science and Technology, Ministry of Agriculture (MOA), Huazhong Agricultural University, No.1 Shizishan Street, Hangshou District, 43070 Wuhan, Hubei, China
autor
  • Key Laboratory of Huazhong Crop Physiology, Ecology and Production, College of Plant Science and Technology, Ministry of Agriculture (MOA), Huazhong Agricultural University, No.1 Shizishan Street, Hangshou District, 43070 Wuhan, Hubei, China
autor
  • Key Laboratory of Huazhong Crop Physiology, Ecology and Production, College of Plant Science and Technology, Ministry of Agriculture (MOA), Huazhong Agricultural University, No.1 Shizishan Street, Hangshou District, 43070 Wuhan, Hubei, China
autor
  • School of Plant Biology, Faculty of Science and The UWA Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, W A 6009, Australia
autor
  • Key Laboratory of Huazhong Crop Physiology, Ecology and Production, College of Plant Science and Technology, Ministry of Agriculture (MOA), Huazhong Agricultural University, No.1 Shizishan Street, Hangshou District, 43070 Wuhan, Hubei, China

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Typ dokumentu

Bibliografia

Identyfikatory

Identyfikator YADDA

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