Effects of short‐term heat stress at the grain formation stage on physicochemical properties of waxy maize starch

Gu, Xiaotian; Huang, Tianqi; Ding, Mengqiu; Lu, Wei; Lu, Dalei

doi:10.1002/jsfa.8549

Cited by 20 publications

(21 citation statements)

References 28 publications

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“…For YN7, RC was decreased by HS, increased by HW, and unaffected by HD. Our previous studies observed that RC is decreased by drought, 23 but its response to waterlogging 24 or HS 43,44 depends on the year and hybrid. This discrepancy may be due to the different growth environment during pre‐silking.…”

Section: Resultsmentioning

confidence: 91%

Water and heat stresses during grain formation affect the physicochemical properties of waxy maize starch

et al. 2020

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BACKGROUND Maize is frequently subjected to simultaneous water (drought or waterlogging) and heat (HS) stresses during grain formation in southern China. This work examined the effect of high temperature combined with drought (HD) or waterlogging (HW) during grain formation on the starch physicochemical properties of two waxy maize hybrids, namely Suyunnuo5 (SYN5) and Yunuo7 (YN7). RESULTS Heat stress enlarged the starch granule size, and water stresses aggravated this effect. Heat stress reduced the ratio of small molecular weight fractions for both hybrids, and HD aggravated this reduction only in SYN5. Relative crystallinity in SYN5 was increased by stresses but in YN7 it was unaffected by HD, reduced by HS, and increased by HW. Fourier‐transform infrared (FTIR) spectrometry results showed that the 1045/1022 cm−1 ratio in SYN5 was not influenced by HW but was increased by other stresses, and that in YN7 it was increased by all stresses, with the highest value induced by HW. Peak viscosity was decreased, whereas gelatinization temperatures and retrogradation percentage were increased by all of these stresses. These effects were exacerbated by combined heat and water stresses. The maximum decomposition rate was severely increased by HW. CONCLUSION Drought or waterlogging at grain formation stage aggravated the detrimental effects of HS on the starch physicochemical properties of waxy maize. © 2020 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 91%

Water and heat stresses during grain formation affect the physicochemical properties of waxy maize starch

et al. 2020

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“…The maximum absorption wavelength (λ max ) of starch was measured according to the procedure in [56].…”

Section: Iodine Stainingmentioning

confidence: 99%

“…The X-ray diffraction (XRD) patterns of starch were obtained by an X-ray diffractometer (D8 Advance, Bruker-AXS, Germany), and the relative crystallinity (RC, %) was calculated according to the procedure in [56].…”

Section: X-ray Diffraction Patternmentioning

confidence: 99%

Application of Exogenous Phytohormones at Silking Stage Improve Grain Quality under Post-Silking Drought Stress in Waxy Maize

Wang¹,

Yan²,

Lu³

et al. 2020

Plants

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The application of exogenous plant growth regulator can improve plant resistance to drought stress. The effects of application of exogenous cytokinin (CTK), brassinolide (BR), or gibberellic acid (GA) at the silking time on the grain quality of two waxy maize hybrids under drought stress at grain formation stage were studied. Grain weight of both hybrids was unaffected by exogenous phytohormones under control conditions but increased under drought conditions with the application of BR. The grain starch content in response to drought varied with hybrid and phytohormone. Starch granule size and protein content in grains were increased by drought under all conditions, but various phytohormones exerted different forms of influence. The starch λmax in Yunuo7 was unaffected by single or interaction of phytohormones and water deficit, λmax in Jingkenuo2000 with BR was unaffected but with CTK or GA increased by drought. Relative crystallinity was reduced by drought without the application of phytohormone, but with phytohormones in response to drought it was different. Flour peak viscosity was reduced by drought. The value was increased with BR spraying under control and drought conditions. Retrogradation percentage under drought conditions was unaffected by exogenous phytohormones in Jingkenuo2000. In Yunuo7, retrogradation percentage was unaffected by BR but reduced by CTK and GA. In conclusion, spraying phytohormones at the silking stage can affect grain weight and starch quality, grains with a sticky taste can be improved by applying BR, and grains with low retrograde tendency can be produced by applying CTK.

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“…The size distributions of starch granules were detected following a previously published protocol. [ 36 ]…”

Section: Methodsmentioning

confidence: 99%

“…Starch Isolation: The starch in mature grains (100 g) was isolated using the method described in a previous study after steeping in 500 mL of 1 g L −1 NaHSO 3 solution at room temperature for 48 h. [35] Granule Size Distribution: The size distributions of starch granules were detected following a previously published protocol. [36] Molecular Weight and ACL Distributions: For isoamylase-debranched starch granules, starch was dispersed in 2.5 mL deionized water by stirring in a boiling water bath for 60 min. After cooling, the mixture was added with 125 μL of 100 mM sodium acetate buffer (pH 6.0), 5 μL of 1% sodium azide, and 10 μL of isoamylase (2000 U μL −1 , EC 3.2.1.68, Sigma) with vortex mixing, and the tube was incubated at 37 °C with slow stirring for 24 h. An aliquot (600 μL) of the debranched sample was dried with N 2 and then reconstituted with 600 μL of 200 mM NaOH.…”

Section: Methodsmentioning

confidence: 99%

Application of Exogenous 6‐benzyladenine at the Silking‐Stage Improves the Starch Quality of Waxy Maize Suffering from Post‐Silking Drought Stress

Huo

Yang

2022

Starch Stärke

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The application of exogenous 6‐benzyladenine (6‐BA) can mitigate plant responses to drought stress. The effects of spraying exogenous 6‐BA at the silking‐stage on the waxy maize starch physicochemical properties under post‐silking well‐watered and drought conditions are studied using Jingkenuo2000 (JKN2000) and Yunuo7 (YN7) as materials. The starch granule size in response to drought is enlarged in JKN2000 but reduced in YN7. However, 6‐BA application enlarges the starch granule size of both hybrids under drought conditions. Under both water conditions, 6‐BA application increases the proportion of high‒molecular weight amylopectin branch chains in both hybrids. The amylopectin chain‐length and relative crystallinity in response to 6‐BA application are dependent on hybrid and water condition. The pasting viscosities of both hybrids are improved by 6‐BA application under well‐watered conditions. However, the peak viscosity under drought is improved in JKN2000 and unaffected in YN7 by 6‐BA application. Under drought, 6‐BA application does notaffect the gelatinization characteristics but decreases the retrogradation enthalpy and percentage of both hybrids. In conclusion, exogenous 6‐BA application at the silking‐stage can improve the pasting viscosities under well‐watered conditions and reduce the retrogradation percentage under drought conditions, thereby alleviating the negative influence of post‐silking drought in waxy maize production.

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Effects of short‐term heat stress at the grain formation stage on physicochemical properties of waxy maize starch

Cited by 20 publications

References 28 publications

Water and heat stresses during grain formation affect the physicochemical properties of waxy maize starch

Water and heat stresses during grain formation affect the physicochemical properties of waxy maize starch

Application of Exogenous Phytohormones at Silking Stage Improve Grain Quality under Post-Silking Drought Stress in Waxy Maize

Application of Exogenous 6‐benzyladenine at the Silking‐Stage Improves the Starch Quality of Waxy Maize Suffering from Post‐Silking Drought Stress

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