Skip to main content
Journal cover image

Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin

Publication ,  Journal Article
Dou, Z; Zhang, H; Chen, W; Li, G; Liu, Z; Ding, C; Chen, L; Wang, S; Ding, Y; Tang, S
Published in: Journal of Agricultural Science
January 5, 2021

Grain-filling, as the final growth stage of rice, is sensitive to environmental temperature change. Previous studies mainly concerned about the effects of high temperature stress during grain-filling on rice growth, and most experiments were carried out with pot for cultivating rice and greenhouse for warming. This research investigated the response of rice grain-filling of superior spikelets (SS) and inferior spikelets (IS) of two japonica cultivars to elevated temperature during grain-filling stage under open-field warming conditions in lower reaches of Yangtze River Basin using free-air temperature enhancement facility. Results indicated that rice yield was not significantly changed by warming less than 4°C. SS and IS showed different responses to elevated temperature during the grain-filling stage, whereas there were similar trends between two cultivars and years. For SS, although elevated temperature enhanced its filling rate during the early grain-filling period, and caused a shorter grain-filling period and a lighter grain weight; for IS, elevated temperature improved its grain weight by enhancing its filling rate during middle and late grain-filling period due to the increased number of days with suitable temperature. For both SS and IS, key starch biosynthesis enzymes and indole-3-acetic acid content exhibited generally a similar dynamics trend with grain-filling rates, and these sink strength parameters presented higher levels under elevated temperature relative to natural temperature for IS during middle and late grain-filling period. Consequently, warming less than 4°C presented different influences on SS and IS; the improvement of IS filling under warming regime was associated with the intensification of grain sink strength.

Duke Scholars

Published In

Journal of Agricultural Science

DOI

EISSN

1469-5146

ISSN

0021-8596

Publication Date

January 5, 2021

Volume

159

Issue

1-2

Start / End Page

59 / 68

Related Subject Headings

  • Agronomy & Agriculture
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Dou, Z., Zhang, H., Chen, W., Li, G., Liu, Z., Ding, C., … Tang, S. (2021). Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin. Journal of Agricultural Science, 159(1–2), 59–68. https://doi.org/10.1017/S0021859621000228
Dou, Z., H. Zhang, W. Chen, G. Li, Z. Liu, C. Ding, L. Chen, S. Wang, Y. Ding, and S. Tang. “Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin.” Journal of Agricultural Science 159, no. 1–2 (January 5, 2021): 59–68. https://doi.org/10.1017/S0021859621000228.
Dou Z, Zhang H, Chen W, Li G, Liu Z, Ding C, et al. Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin. Journal of Agricultural Science. 2021 Jan 5;159(1–2):59–68.
Dou, Z., et al. “Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin.” Journal of Agricultural Science, vol. 159, no. 1–2, Jan. 2021, pp. 59–68. Scopus, doi:10.1017/S0021859621000228.
Dou Z, Zhang H, Chen W, Li G, Liu Z, Ding C, Chen L, Wang S, Ding Y, Tang S. Grain-filling of superior spikelets and inferior spikelets for japonica rice under low-amplitude warming regime in lower reaches of Yangtze River Basin. Journal of Agricultural Science. 2021 Jan 5;159(1–2):59–68.
Journal cover image

Published In

Journal of Agricultural Science

DOI

EISSN

1469-5146

ISSN

0021-8596

Publication Date

January 5, 2021

Volume

159

Issue

1-2

Start / End Page

59 / 68

Related Subject Headings

  • Agronomy & Agriculture
  • 30 Agricultural, veterinary and food sciences
  • 07 Agricultural and Veterinary Sciences