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2013 | 35 | 06 |

Tytuł artykułu

Effect of short-term heat stress on growth, physiology and antioxidative defence system in wheat seedlings

Warianty tytułu

Języki publikacji

EN

Abstrakty

EN
An experiment was conducted to find out the effect of short-term heat stress on morpho-physiological characters and antioxidants in 10 diverse wheat genotypes. Seed were aseptically grown in test tubes containing filter paper whose lower half was dipped in one-fourth MS media. Heat stress conditions were created by exposing the seedlings at 45 ºC for 2 h after 7 days of their germination. Measurements were taken after 3 days of treatment. Heat stress significantly reduced the shoot dry mass, root dry mass, shoot length and root length in all the genotypes. The chlorophyll content and membrane stability index decreased, whereas proline content increased in heat-treated plants. There was significant increase in the activity of catalase, guaiacol peroxidase and superoxide dismutase under stress conditions. The genotypic variations were also significant. On the basis of a coordinated simulation of all these parameters, wheat genotypes Raj 4037 and PBW 373 were identified as tolerant to high temperature stress. The study provides evidence that the tolerant genotypes were equipped with better management of physiological processes along with an efficient antioxidative defence system, sensitivity of which can be evaluated to a sufficient level of certainty at seedling stage.

Słowa kluczowe

Wydawca

-

Rocznik

Tom

35

Numer

06

Opis fizyczny

p.1837-1842,fig.,ref.

Twórcy

autor
  • Plant Biotechnology Centre, S K Rajasthan Agricultural University, Bikaner 334006, India
  • Plant Biotechnology Centre, S K Rajasthan Agricultural University, Bikaner 334006, India
  • College of Agriculture, S K Rajasthan Agricultural University, Bikaner 334006, India
  • Central Arid Zone Research Institute, Regional Research Station, Bikaner 334004, India
autor
  • College of Agriculture, S K Rajasthan Agricultural University, Bikaner 334006, India
autor
  • Plant Biotechnology Centre, S K Rajasthan Agricultural University, Bikaner 334006, India

Bibliografia

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  • Dash S, Mohanty N (2001) Evaluation of assays for the analysis of thermo-tolerance and recovery potentials of seedlings of wheat (Triticum aestivum L.) cultivars. J Plant Physiol 158:1153–1165
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  • Sairam RK, Deshmukh PS, Shukla DS (1997) Tolerance to drought and temperature stress in relation to increased antioxidant enzyme activity in wheat. J Agron Crop Sci 178:171–177
  • Suzuki N, Mittler R (2006) Reactive oxygen species and temperature stresses: a decline balance between signalling and destruction. Physiol Plant 126:45–51
  • Vacha F, Adamec F, Valenta J, Vacha M (2007) Spatial Location of photosystem pigment-protein complexes in thylakoid membranes of chloroplast of Pisum sativum studied by chlorophyll fluroscence. J Luminesc 122–123:301–303
  • Wahid A (2007) Physiological implications of metabolites biosynthesis in net assimilation and heat stress tolerance of sugarcane sprouts. J Plant Res 120:219–228
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Typ dokumentu

Bibliografia

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