Evaluation of the concentration-response relationship between film antitranspirant and yield of rapeseed (Brassica napus L.) under drought

Jie, Xiang; Vickers, Laura H.; Hare, M. C.; Kettlewell, P. S.

doi:10.1016/j.agwat.2022.107732

Cited by 8 publications

(8 citation statements)

References 31 publications

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“…Treatment differences in rate of stomatal conductance decline (Exp 2 only) were not exactly the same as the rate of weight loss, even in the same experiment (separate experiment data not presented), although this could be attributable to the time difference in the measurements: rate of weight loss in Exp 2 was over 1–10 DAS, whereas stomatal conductance decline was measured over 8–22 DAS. The linear effect of oil on the rate of stomatal conductance decline is similar to the linear effect of DPM on stomatal conductance in older rapeseed plants found in other work, 7 and is also consistent with the reductions in transpiration found in early research with other hydrophobic polymers 4…”

Section: Discussionsupporting

confidence: 89%

Applying sunflower oil to rapeseed plants reduces water loss

de Godoi,

Kettlewell

2023

J Sci Food Agric

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BACKGROUNDHydrophobic polymers are used as antitranspirants to block stomata and reduce water loss from plants and thus drought stress, although the use of current commercial products is limited because they are expensive. Plant oils may be much cheaper hydrophobic polymers if they have similar efficacy to commercial antitranspirant products. Two experiments with pot‐grown rapeseed plants were conducted to compare sunflower oil with the commercially‐available antitranspirant di‐1‐p‐menthene (DPM) for efficacy in reducing water loss, and to test for a linear response to increasing oil concentration.RESULTSSunflower oil at the same concentration as DPM (0.5%) was similar in efficacy in reducing the rate of water loss, measured as both rate of weight loss of the plant and rate of stomatal conductance decline. There was a linear response to increasing concentrations of oil, as found in previous research with DPM on rapeseed, with a slower rate of water loss the greater the concentration.CONCLUSIONIf other plant oils are equally or more effective in reducing water loss as sunflower oil, there may be potential for plant oils to be used as low‐cost antitranspirants to reduce drought damage on large‐scale commodity crops, and also by smallholder farmers in low‐income countries using locally‐produced plant oils. © 2023 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Section: Discussionsupporting

confidence: 89%

Applying sunflower oil to rapeseed plants reduces water loss

de Godoi,

Kettlewell

2023

J Sci Food Agric

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“…The current commercially available film-forming ATs (Table 1) are mostly water-emulsifiable organic polymers that form films after a spray application has dried. The films act as a physical waterproof barrier over stomata and by which transpirational water loss is reduced (Xiang et al, 2022). Vapor Gard ® and Wilt-Pruf ® have been the oldest in the market.…”

Section: Commercial Antitranspirant Productsmentioning

confidence: 99%

Commercial uses of antitranspirants in crop production: A review

2023

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Global food security is at risk due to the predicted climate change, making it imperative for agronomists to provide adaptive technologies that will sustain and improve food production. Rainfed agriculture, prone to drought, covers an estimated 80% of global cropland. One of the adaptive technologies is the use of antitranspirants – products that are applied on plants to reduce transpirational water loss and increase crop performance under drought conditions. The benefits of improving antitranspirant adoption in drought mitigation are expected to be high, especially in many drought-prone low-income countries where crop production is almost wholly dependent on rainfall. The objective of this article was to review the commercial uses of antitranspirants in food and non-food crop production. The review revealed that in horticulture, antitranspirants have several commercial uses, in addition to drought mitigation, such as transplanting shock amelioration, protection of fruit against sunburn, enhancement of nutritional quality, synchronising fruit ripening, protection of fruit and nut trees against diseases. Use of antitranspirants in arable farming has been neglected for three main reasons: first, arable crops have lower market value, for example, in Melbourne (Australia) in October 2022, a tonne of grapes was worth US$ 2694.82 compared to US$ 277/tonne of wheat. Second, molecular genetics applied to crop breeding has risen as an alternative approach to drought mitigation, shifting attention from antitranspirants. Finally, the erroneous research conclusion in the 1970s that antitranspirants could not increase yield because they reduced photosynthesis discouraged commercialisation of antitranspirants in arable farming. An antitranspirant breakthrough to either lower the cost or create a multi-purpose product is needed for the production of arable crops, especially major cereals, as has been the case for non-drought amelioration uses in horticulture.

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“…Stomatal blockers are used commercially to reduce water loss from plants, in this context being referred to as film antitranspirants 8 . They have been mainly used on ornamentals, but there is now good evidence that, if they are applied at the most drought‐sensitive stage of development, they can benefit food crops such as wheat 9,10 and rapeseed 11,12 . There may be a new direction for research on these polymers as growth retardants because it has been reliably established in a large number of studies and in many species that stomatal blockers reduce photosynthesis in addition to transpiration 6 .…”

Section: Stomatal Blockersmentioning

confidence: 99%

Restricting growth for improved fresh produce scheduling: A role for stomatal blockers?

Kettlewell

2023

Modern Agriculture

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Evaluation of the concentration-response relationship between film antitranspirant and yield of rapeseed (Brassica napus L.) under drought

Cited by 8 publications

References 31 publications

Applying sunflower oil to rapeseed plants reduces water loss

Applying sunflower oil to rapeseed plants reduces water loss

Commercial uses of antitranspirants in crop production: A review

Restricting growth for improved fresh produce scheduling: A role for stomatal blockers?

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