Effects of water deficit during grain filling on the physicochemical properties of waxy maize starch

Lu, Dalei; Cai, Xuemei; Lu, Wei

doi:10.1002/star.201500061

Cited by 22 publications

(57 citation statements)

References 39 publications

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“…reported that single or combined heat and drought stress reduces the proportion of large starch granules, and the stress combination has significant additive effects. Our previous studies revealed that starch granule size was enlarged by HS 25 but reduced by drought 23 and waterlogging 24 under ambient temperature. The enlarged starch granule size under HS may be due to the reduced endosperm cell number, 36 which is also exacerbated by water stress (deficit or excess) under HS.…”

Section: Resultsmentioning

confidence: 95%

“…Among the types of maize starch, waxy maize ( Zea mays L. sinensis Kulesh) starch comprises nearly 100% amylopectin and is used differently in the food and non‐food industries 22 . We previously revealed that the starch physicochemical properties of waxy maize are affected by post‐silking individual drought, waterlogging, or heat stresses 23–25 . Understanding starch physicochemical properties exposed to these adversities is necessary to utilize waxy maize efficiently for different applications.…”

Section: Introductionmentioning

confidence: 99%

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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: 95%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…19 observed that post-anthesis water stress decreased the wheat grain weight and grain filling rates due to the decrease of grain IAA and ABA contents at the early and middle stages of grain filling. Our early studies reported that waxy maize flour and starch physiochemical properties were changed by drought after pollination 20,21 . Starch formation and accumulation were co-adjusted by a series of starch synthetic enzymes and endogenous hormones, and clarfying the effects of post-silking water deficit on those enzymes and hormones could improve our understanding on starch development under drought conditions.…”

Section: Introductionmentioning

confidence: 99%

Activities of starch synthetic enzymes and contents of endogenous hormones in waxy maize grains subjected to post-silking water deficit

Yang

Ding

et al. 2019

Sci Rep

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Rainfed maize in Southern China and frequently suffer water deficit at later plant growth periods. A pot trial in 2014–2015 was conducted to study the effects of drought stress (the relative soil moisture contents are 70–80% and 50–60% under control and water deficit conditions, respectively) after pollination on grain filling and starch accumulation, activities of starch synthetic enzymes, and contents of indole-3-acetic acid (IAA) and abscisic acid (ABA), with Suyunuo5 as test material. The grain fresh weight, volume, and dry weight were not affected by drought before 10 days after pollination but were restricted thereafter. The reduction at maturity was reduced by 33.3%, 40.0%, and 32.3% in 2014 and by 21.7%, 24.3%, and 18.3% in 2015. The grain filling rate was suppressed by water deficit, whereas grain moisture and starch content were slightly affected. The starch accumulation was decreased by 33.5% and 20.0% at maturity in 2014 and 2015, respectively. The activities of starch synthetic enzymes (sucrose phosphate synthase, sucrose synthase, ADP-glucose pyrophosphorylase, soluble starch synthase, and starch branching enzyme) were downregulated by post-silking drought. The ABA content was increased, whereas IAA content was decreased when plants suffered water deficit during grain filling. In conclusion, post-silking water deficit increased ABA content, decreased IAA content, and weakened the activities of starch synthetic enzymes, which suppressed grain development and ultimately reduced grain weight.

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“…Previous studies have mainly focused on the effects of drought on grain development 18 – 22 , starch biosynthesis 12 , 23 and physicochemical properties 11 , 24 , 25 in cereal crops. However, limited information is available regarding the influence of soil drought on the functional or fine structural characteristics of endosperm starch and the underlying physiological mechanism.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Structural and Functional Properties of Wheat Starch Under Different Soil Drought Conditions

Zhang

Wang

et al. 2017

Sci Rep

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Drought influences cereal crop yield and quality. However, little is known about changes in the structural and functional properties of wheat starch under soil drought conditions. In this study, two wheat cultivars were subjected to well-watered (WW), moderate soil-drought (MD), and severe soil-drought (SD) from 7 tillers in the main stem to maturity. The structural and functional properties of the resultant endosperm starch were investigated. In comparison with WW soil, the MD increased starch accumulation in grains, the proportion of large starch granules, amylose and amylopectin long branch chain contents, and average amylopectin branch chain length, which were accompanied by the increase in activities of granule bound starch synthase and soluble starch synthase. MD treated-starch had a lower gelatinization enthalpy, and swelling power, but a higher gelatinization temperature, retrogradation enthalpy, and retrogradation percentage when compared to WW conditions. The MD also increased starch resistance to acid hydrolysis, amylase hydrolysis, and in vitro digestion. The SD had the opposite effects to the MD in all cases. The results suggest that soil drought more severely affects amylose synthesis than amylopectin synthesis in wheat grains, and moderate soil-drought improves molecular structure and functional properties of the starch.

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Effects of water deficit during grain filling on the physicochemical properties of waxy maize starch

Cited by 22 publications

References 39 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

Activities of starch synthetic enzymes and contents of endogenous hormones in waxy maize grains subjected to post-silking water deficit

Comparison of Structural and Functional Properties of Wheat Starch Under Different Soil Drought Conditions

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