Response of Summer Maize Photosynthate Accumulation and Distribution to Shading Stress Assessed by Using 13CO2 Stable Isotope Tracer in the Field

Gao, Jia; Zhao, Bin; Dong, Shuting; Liu, Peng; Ren, Baizhao; Zhang, Jiwang

doi:10.3389/fpls.2017.01821

Cited by 55 publications

(48 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The reduced post-silking dry matter accumulation may be due to the decreased photosynthetic capacity attributed to light deprivation, which limits the source capacity for grain development [5,6,8,11]. The low SPAD value and photosynthetic rate (unpublished data) under shading indicated that the photosynthetic function deteriorated, and the leaf photoprotection mechanism was probably damaged, thereby decreasing photosynthesis and dry matter accumulation [10]. Nevertheless, studies on rice [32,33] and wheat [34] have found that leaf chlorophyll content is increased by shading, thereby improving the light harvesting potential to enhance light-use efficiency and reducing the dissipation of light energy.…”

Section: Discussionmentioning

confidence: 99%

“…Root physiological properties (dry weight, root/shoot ratio, absorption area) are deteriorated by shading [9]. Additionally, leaf relative chlorophyll content and plant dry matter accumulation are reduced [10], resulting in grain yield loss. Under low light conditions, the activity of the carbon-concentrating mechanism generally decreases [1].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China

Wang

Shi

et al. 2020

Plants

View full text Add to dashboard Cite

Lower sunlight caused by overcast skies from June to July in Southern China is one of the main environmental stresses that frequently occur and affect the post-silking growth and grain development of spring maize. In this study, a field trial involving four maize hybrids as materials was conducted to investigate the effects of post-silking shading stress (30% and 50% light deprivation) on leaf nitrogen metabolism and biomass accumulation during maize growing seasons in 2016 and 2017. Results indicated that 30% and 50% shading stress caused the grain yield to decrease by 47.3% and 69.6%, respectively. Plant post-silking biomass accumulation was decreased by shading, whereas the translocation from pre-silking assimilates in the vegetative organs was increased by shading. This change was sharply observed when the plants were deprived of more sunlight intensity. The leaf relative chlorophyll (soil and plant analyzer development (SPAD) value) and soluble protein contents were considerably decreased by shading under 50% light deprivation condition. The activities of nitrate reductase, glutamine synthetase and glutamate synthase that are involved in nitrogen metabolism were downregulated by shading stresses. In conclusion, nitrogen metabolism was disturbed by shading, which induced the decrease in post-silking dry matter accumulation, ultimately resulting in grain yield loss.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China

Wang

Shi

et al. 2020

Plants

View full text Add to dashboard Cite

show abstract

“…The photosynthesis is influenced by differentiation and development of thin-walled tissue which is extremely sensitive to shading [3,4]. In recent years, researches pay more attention to shade stress of C4 plants [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Physiological and comparative proteomic analysis provides new insights into the effects of shade stress in maize (Zea mays L.)

et al. 2020

Self Cite

View full text Add to dashboard Cite

Background: Shade stress, a universal abiotic stress, suppresses plant growth and production seriously. However, little is known regarding the protein regulatory networks under shade stress. To better characterize the proteomic changes of maize leaves under shade stress, 60% shade (S) and supplementary lighting (L) on cloudy daylight from tasseling stage to physiological maturity stage were designed, the ambient sunlight treatment was used as control (CK). Isobaric tag for relative and absolute quantification (iTRAQ) technology was used to determine the proteome profiles in leaves. Results: Shading significantly decreased the SPAD value, net photosynthetic rate, and grain yield. During two experimental years, grain yields of S were reduced by 48 and 47%, and L increased by 6 and 11%, compared to CK. In total, 3958 proteins were identified by iTRAQ, and 2745 proteins were quantified including 349 proteins showed at least 1.2-fold changes in expression levels between treatments and CK. The differentially expressed proteins were classified into photosynthesis, stress defense, energy production, signal transduction, and protein and amino acid metabolism using the Web Gene Ontology Annotation Plot online tool. In addition, these proteins showed significant enrichment of the chloroplasts (58%) and cytosol (21%) for subcellular localization. Conclusions: 60% shade induced the expression of proteins involved in photosynthetic electron transport chain (especially light-harvesting complex) and stress/defense/detoxification. However, the proteins related to calvin cycle, starch and sucrose metabolisms, glycolysis, TCA cycle, and ribosome and protein synthesis were dramatically depressed. Together, our results might help to provide a valuable resource for protein function analysis and also clarify the proteomic and physiological mechanism of maize underlying shade stress.

show abstract

“…For example, the numbers of cloudy/overcast/rainy days from early‐June to mid‐July in 2016 and 2017 in Yangzhou were 47 and 46, respectively (data available at http://www.tianqihoubao.com/lishi/yangzhou.html). Studies have observed that postsilking shading decreases photosynthetic and electron transport rates (Gao, Zhao, et al, ; Reed, Singletary, Schussler, Williamson, & Christy, ; Ren et al, ; Zhong, Shi, Li, & Huang, ), damages the leaf mesophyll cell ultrastructure (Ren et al, ), reduces the activities of enzymes involved in photosynthesis (Sharwood, Sonawane, & Ghannoum, ) and the activity of the carbon‐concentrating mechanism with increased leakiness (Bellasio & Griffiths, ), affects the root morphology and activity indices (Gao, Shi, et al, ), increases the grain abscisic acid (ABA) content (Setter, Flannigan, & Melkonian, ), and reduces the endosperm cell number and volume (Jia, Li, Dong, & Zhang, ). These adverse effects reduce the dry matter and nutrient accumulation (Cui et al, ; Gao, Zhao, et al, ; Liu & Tollenaar, ; Mbewe & Hunter, ), increase aborted grain numbers due to the nearly halted filling of apical grains, and decrease grain weight (Cui, Camberato, Jin, & Zhang, ; Reed et al, ; Setter et al, ).…”

Section: Introductionmentioning

confidence: 99%

Effects of postsilking weak‐light stress on the flour quality of spring maize

Wen

Shi

et al. 2019

Cereal Chem

View full text Add to dashboard Cite

Background and objectives The low sunlight from June to July caused by cloudy weather in Southern China has a detrimental influence on the grain yield and quality of spring maize because this period overlaps with the grain filling stage. A field trial was conducted to study the effects of postsilking shading (30% and 50% light deprivation defined as moderate sunlight [MS] and severe shading [SS], respectively, and with plants under natural sunlight as the control) on grain weight, nutrient contents, pasting, and thermal properties in 2016–2017. Zhengdan958 (ZD958) and Suyu30 (SY30) were used as materials. Findings MS and SS reduced the grain weight by 26.7% and 42.4% for ZD958 and by 17.4% and 25.7% for SY30 in 2016, respectively. In 2017, the decrease was 6.8% and 2.7% for ZD958 and SY30, respectively, and no difference was observed between MS and SS. Shading reduced the starch content and increased the protein content, and the effects were severe when a large amount of sunlight was deprived. SS increased the starch granule size in both varieties and years. MS resulted in an increase in 2016, but no increase was observed in 2017. Peak, trough, and breakdown viscosities decreased under shading. Similar reductions were generally observed between MS and SS. Shading exerted minimal effects on gelatinization and retrogradation temperatures, but the gelatinization enthalpy and peak height index gradually decreased with decreasing sunlight intensity. The retrogradation percentage increased under shading, and this increment was similar for MS and SS in 2016 and gradually intensified with increasing light deprivation in 2017. Conclusions Shading reduced starch and amylose contents and increased protein contents and starch granule size. These effects induced low peak and breakdown viscosities and high retrogradation percentage. The high viscosities and low retrograde of SY30 indicated that it has better grain quality than ZD958. Significance and novelty Shading deteriorates flour viscosity and increases the retrogradation tendency by reducing grain starch content and increasing protein content and starch granule size.

show abstract

Response of Summer Maize Photosynthate Accumulation and Distribution to Shading Stress Assessed by Using 13CO2 Stable Isotope Tracer in the Field

Cited by 55 publications

References 34 publications

Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China

Post-Silking Shading Stress Affects Leaf Nitrogen Metabolism of Spring Maize in Southern China

Physiological and comparative proteomic analysis provides new insights into the effects of shade stress in maize (Zea mays L.)

Effects of postsilking weak‐light stress on the flour quality of spring maize

Contact Info

Product

Resources

About