Leaf photosynthetic function duration during yield formation of large-spike wheat in rainfed cropping systems
- Published
- Accepted
- Subject Areas
- Agricultural Science, Plant Science
- Keywords
- Large-spike wheat, Grain yield, Drought resistance, Photosynthesis characteristics
- Copyright
- © 2018 Wang et al.
- Licence
- This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ Preprints) and either DOI or URL of the article must be cited.
- Cite this article
- 2018. Leaf photosynthetic function duration during yield formation of large-spike wheat in rainfed cropping systems. PeerJ Preprints 6:e27132v1 https://doi.org/10.7287/peerj.preprints.27132v1
Abstract
Improving photosynthetic capacity significantly affects the yield of wheat (Triticum aestivum L.) in rainfed regions. In this study, the physiological characteristics of eight large-spike wheat lines were compared with a multiple-spike cultivar as a control (CK) in a field over two consecutive seasons: 2010–2012. The tillering peak was 7–21 d after returning green for line 2040, the average rate of decline of relative water content was slower, and the average duration time of photosynthetic rate was longer than CK in vitro. There was a strong linear and positive correlation between photosynthetic rate and root activity at jointing, flowering, and grain-filling stages. In addition, average yields were higher in large-spike lines than CK (multiple-spike cultivar). The results suggest that large-spike lines might have greater water retaining capacity during yield formation under rainfed conditions.
Author Comment
This is a submission to PeerJ for review.
Supplemental Information
Raw data of Figure 2-7
Figure 2: The dynamic changes in tiller number in eight large-spike wheat lines and one multiple-spike cultivar (Xi’nong 979) from seeding to mature stage Figure 3: Time courses of chlorophyll relative value (SPAD) decline in fully expanded (A–C) and detached (D–F) leaves at different positions (leaf 5, leaf 7, and flag leaf) for different wheat materials Figure 4: Time courses of relative water content (RWC) decline in detached leaves at jointing, flowering, and grain-filling stages for different wheat materials Figure 5: Time courses of photosynthetic rate (Pn) decline in detached leaves at jointing, flowering, and grain-filling stages for different wheat materials Figure 6: The relationship between photosynthetic rate (Pn) and root activity (TTC) of large-spike wheat lines during the growth period Figure 7: Dynamic changes in dry weight (DW) of single spike and leaf + stem + sheath in large-spike lines and CK (Xi’nong 979)