Effects of zinc on photosynthesis and yield of wheat under heat stress

2001

Research organisatons

Trial details

Researcher(s) AW Graham and GK McDonald
Year(s) 2001
Contributor South Australian Research and Development Institute
Trial location(s) Site 2, Adelaide, SA
Further information View external link
Effects of zinc on photosynthesis and yield of wheat under heat stress locations
Aims

To examine the interaction between Zn nutrition and heat stress on the photosynthetic activity and grain yield of wheat plants under both field and growth room conditions.

Key messages
  • Studies examined the interaction between Zn nutrition and heat stress on the photosynthetic activity and grain yield of wheat plants under both field and growth room conditions.
  • The Zn inefficient cultivar Goldmark was found to have an improved chlorophyll fluorescence ratio (Fv/Fm), a measure of injury to photosynthesis, under heat stress when supplied with elevated levels of Zn compared to plants where less Zn was applied.
  • However supplementary Zn did not prevent a decline in kernel weight or grain yield under high temperature conditions.
  • The results indicate that supplementary Zn nutrition, in a Zn inefficient genotype at least, can provide thermotolerance to the photosynthetic apparatus of wheat.
Lead research organisation N/A
Host research organisation University of Adelaide
Related program More Profit from Crop Nutrition
Acknowledgments

Technical assistance with ICP analyses from Mrs T Fowles and Mr L Palmer is gratefully acknowledged. The first author would like to acknowledge financial assistance provided by an Australian Postgraduate Award and Turner Family Scholarship.


Other trial partners Not specified

Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
Trial type Experimental
Trial design Replicated

Adelaide 2001

Sow date Not specified
Harvest date Not specified
Plot size Not specified
Plot replication 3
Fertiliser

Pot experiment: Zinc treatments were 0.2 and 2 mg Zn kg-1 soil applied as ZnSO4.7H20 (designated as Zn0.2 and Zn2). Field experiment: Fertiliser (80 kg N ha-1, 34 kg P ha-1 and 95 kg K ha-1) was applied at stem elongation and urea (19 kg N ha-1) was applied at anthesis.




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Trial last modified: 09-10-2019 11:25am AEST