Seasonal and diurnal patterns of non-structural carbohydrates in source and sink tissues in field maize

Background

Carbohydrate partitioning and utilization is a key determinant of growth rate and of yield in plants and crops. There are few studies on crops in field conditions. In Arabidopsis, starch accumulation in leaves is a negative indicator of growth rate.

Results

Here, we wished to establish if starch accumulation in leaves could potentially be a marker for growth rate and yield in crops such as maize. We characterized daily patterns of non-structural carbohydrate (NSC) at different growth stages over two seasons for maize hybrids in the field. In 27 commercial hybrids, we found a significant negative relationship between residual starch in leaves and plant growth, but not with final yield and biomass. We then focused on three typical hybrids and established a method for calculation of C turnover in photosynthetic leaves that took into account photosynthesis, leaf area and NSC accumulation. The ratios of stored NSC decreased from approximately 15% to less than 4% with ongoing ontogeny changes from V7 to 28 days after pollination.

Conclusion

The proportion rather than absolute amount of carbon partitioned to starch in leaves at all stages of development related well with yield and biomass accumulation. It is proposed that screening plants at an early vegetative growth stage such as V7 for partitioning into storage may provide a prospective method for maize hybrid selection. Our study provides the basis for further validation as a screening tool for yield.

Data and Resources

Additional Info

Field Value
Author Liang, Xiao-Gui
Last Updated November 22, 2019, 14:17 (UTC)
Created November 22, 2019, 14:13 (UTC)
Article Host Type publisher
Article Is Open Access true
Article License Type cc-by
Article Version Type publishedVersion
Citation Report https://scite.ai/reports/10.1186/s12870-019-2068-4
DFW Organisation RRes
DFW Work Package 1
DOI 10.1186/s12870-019-2068-4
Date Last Updated 2019-11-22T14:13:28.512465
Evidence oa journal (via doaj)
Funder Code(s) National Key Research and Development Program of China (2016YFD0300301); China Agriculture Research System (CARS-02-13); Biotechnology and Biological Sciences Research Council (BB/P016855/1)
Journal Is Open Access true
Open Access Status gold
PDF URL https://bmcplantbiol.biomedcentral.com/track/pdf/10.1186/s12870-019-2068-4
Publisher URL https://bmcplantbiol.biomedcentral.com/articles/10.1186/s12870-019-2068-4