Oil Yield Components of Maize Crops Exposed to Heat Stress during Early and Late Grain‐Filling Stages

Mayer, Luis Ignacio; Edreira, Juan I. Rattalino; Maddonni, Gustavo Ángel

doi:10.2135/cropsci2013.11.0795

Cited by 35 publications

(33 citation statements)

References 69 publications

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“…This also indicates that for every 1 • C rise in temperature, the yields of wheat soybean, mustard, groundnut and potato would decline by 3-7% in India [49]. Maize is also highly susceptible to heat stress during the reproductive stage [7,[50][51][52], and it is reported that each degree increase in a day where the temperature exceeds 30 • C reduces the final yield of maize by 1% under favorable growing conditions, and by 1.7% under drought-stressed conditions [53]. This shows that heat stress will be a major climate risk for crop production across Bihar, particularly for winterand spring-sown crops when higher temperatures coincide with the reproductive phase of the crops.…”

Section: Temperature Changes and Implications For Crop Productionmentioning

confidence: 99%

Climate Variability and Change in Bihar, India: Challenges and Opportunities for Sustainable Crop Production

et al. 2017

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Climate change and associated uncertainties have serious direct and indirect consequences for crop production and food security in agriculture-based developing regions. Long-term climate data analysis can identify climate risks and anticipate new ones for planning appropriate adaptation and mitigation options. The aim of this study was to identify near-term (2030) and mid-term (2050) climate risks and/or opportunities in the state of Bihar, one of India's most populous and poorest states, using weather data for 30 years (1980-2009) as a baseline. Rainfall, maximum and minimum temperatures, and evapotranspiration will all increase in the near-and mid-term periods relative to the baseline period, with the magnitude of the change varying with time, season and location within the state. Bihar's major climate risks for crop production will be heat stress due to increasing minimum temperatures in the rabi (winter) season and high minimum and maximum temperatures in the spring season; and intense rainfall and longer dry spells in the kharif (monsoon) season. The increase in annual and seasonal rainfall amounts, and extended crop growing period in the kharif season generally provide opportunities; but increasing temperature across the state will have considerable negative consequences on (staple) crops by affecting crop phenology, physiology and plant-water relations. The study helps develop site-specific adaptation and mitigation options that minimize the negative effects of climate change while maximizing the opportunities.

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Section: Temperature Changes and Implications For Crop Productionmentioning

confidence: 99%

Climate Variability and Change in Bihar, India: Challenges and Opportunities for Sustainable Crop Production

et al. 2017

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“…Treatments included a combination of four maize hybrids (H) with distinctive endosperm types (Flint: orange-flint; Pop: popcorn; Te: temperate semi-dent, and TeTr: temperate × tropical semi-dent) and two temperature regimes (TR) applied at daytime hours (non-heated control and heated) during two different growth stages (GS) of the effective grain-filling period (early and late) of 15-d duration. More details about the crop husbandry can be found in Mayer et al (2014). In both Exp, a single stand density of 9 plants m -2 was used.…”

Section: Crop Husbandry and Treatment Descriptionsmentioning

confidence: 99%

“…Kernel starch or protein concentration (in mg g -1 ) was expressed on a dry weight basis. More details about TRs can be found in Table 1 in Mayer et al (2014). After near infra-red transmittance analysis, at least a 20-g bulk of kernels from each sample was used to determine individual endosperm weight.…”

Section: Final Starch and Protein Concentration Of Kernels And Endospmentioning

confidence: 99%

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Heat Stress during Grain Filling Modifies Kernel Protein Composition in Field‐Grown Maize

2016

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Episodes of extremely high temperatures (>35°C) may cause a premature cessation of maize kernel growth (i.e., heat stress), depressing crop grain yield. However, little is known about the influence of this constraint on chemical composition of maize kernels, a key trait for end‐use related attributes. Four maize genotypes (flint, popcorn, temperate semi‐dent, and temperate × tropical semi‐dent) with distinctive endosperm types were grown at heated and non‐heated temperature regimes during the early or late stages of the effective grain‐filling period. Heat stress during early stages decreased both protein and starch contents of kernels, but the impact on the former was lower (up to −42%) than on the latter (up to −50%), resulting in increases of kernel protein concentration (up to +14%). The flint and popcorn hybrids, with hard endosperm type, tended to be less vulnerable to such effects due to an enhanced capacity to sustain kernel growth. For all hybrids, heat stress during late stages of kernel growth, reduced similarly protein and starch contents (up to −38%), without affecting kernel protein concentration. Heat stress always altered endosperm protein composition by increasing the relative abundance of glutelins, and β‐ plus γ‐zeins, at the expense of that of α‐zeins. The significant environment × endosperm‐type interaction for kernel chemical compounds should be linked to quality parameters for different maize end‐uses.

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“…These results are consistent with previous reports that indicated that rainfall directly influenced the total production of maize due to increases in the distribution, density and depth of the roots (37) . Moreover, extreme temperatures affect directly the grain weight (38,39) and yield (40)(41)(42)(43) . Heat stress reduced maize grain weight due to proportional losses in grain composition (starch, protein and oil contents) and due to its direct effect during the grain-filling period, which caused a cessation of grain filling (43)(44) .…”

Section: Discussionmentioning

confidence: 99%

Yield of forage, grain and biomass in eight hybrids of maize with different sowing dates and environmental conditions

López¹,

Rosales-Nieto²,

López³

et al. 2017

Rev. Mex. Cienc. Pecu.

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The aim was to evaluate yield of forage, grain and biomass and fibre content of eight hybrids of maize (Rio-Grande, Arrayan, Genex 778, Narro 2010, Advance 2203, DAS 2358, P4082W and HT9150W) during two sowing seasons (spring/summer) for two consecutive years at La Laguna in Torreon, Mexico. Once the grain progression of the kernel milk line was ⅓, green forage yield (GFY), dry matter (DM), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were determined. When the corncobs were fully mature, grain yield (GY) and biomass production (TBP) were determined. Weather conditions were recorded during the experiment. The results indicated that maximum temperature was higher and rainfall lower in the summer sowing and second year. Spring sowing had significantly higher yields of GFY, DM, GY and TBP compared to summer sowing. The first year of study showed significantly higher yields regarding GFY, GY and TBP, but FDN, FDA, DM content compared to the second year. The best hybrid for GFY and DM was Rio-Grande; for FDN and FDA was Advance 2203; for GY was HT9150W and finally for TBP was Arrayan. Regardless of the hybrid used and the sowing season, production of maize depended on external factors such as maximum temperature and rainfall; therefore, producers need to consider sowing in spring to avoid the negative effect of high temperatures on plant development.

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Oil Yield Components of Maize Crops Exposed to Heat Stress during Early and Late Grain‐Filling Stages

Cited by 35 publications

References 69 publications

Climate Variability and Change in Bihar, India: Challenges and Opportunities for Sustainable Crop Production

Climate Variability and Change in Bihar, India: Challenges and Opportunities for Sustainable Crop Production

Heat Stress during Grain Filling Modifies Kernel Protein Composition in Field‐Grown Maize

Yield of forage, grain and biomass in eight hybrids of maize with different sowing dates and environmental conditions

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