Effects of Dry Matter Production, Translocation of Nonstructural Carbohydrates and Nitrogen Application on Grain Filling in Rice Cultivar Takanari, a Cultivar Bearing a Large Number of Spikelets
By K. Nagata, S. Yoshinaga, J. Takanashi, T. Terao. 2001
87 citations recorded by the source corpus.
Abstract The effects of dry matter production and the remobilization of nonstructural carbohydrates (NSC) on grain filling were investigated using the Indica-based Japonica crossed rice cultivar Takanari, which can bear a large sink. For three years,beginning in 1994, shade treatments were conducted with different nitrogen applications to develop large variations in plant growth. The percentage of ripened spikelets showed the greatest correlation with the total amount of carbohydrate supply per spikelet during 10 to 20 days after heading, calculated by adding the amount of dry matter increase to the amount ofNSC decrease in leaf sheaths and culms during the period. Between the two components, the dry matter increase was more important. The NSC reserve played a role in compensating for the shortage of carbohydrate supply from assimilates after heading and showed a tendency to increase the percentage of ripened spikelets when dry matter production after heading was limited. However, the maximum ratio of compensatory translocation from the NSC reserve was estimated to be only 48%, becauseofsmaller reservoir size compared with the demand. The NSC reserve at heading was not significantly increased by increasing the dry matter production before heading. It was concluded that to increase grain filling ability it is more effective to increase the dry matter production after heading than that before heading. Nitrogen application showed negative effectson the translocation of reserve NSC. It is important to optimize the nitrogen content to maximize the total source of carbohydrate supply.
Subfields: Plant Science
View Paper: https://www.semanticscholar.org/paper/1fe4d309906e89061575a84fd9cec3fb6aa0788f
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Citations in the corpus
- Control of rice grain-filling and yield by a gene with a potential signature of domestication (2008, background): “The duration and rate of grain-filling, which determine final grain weight and thereby contribute greatly to grain productivity, are also controlled by QTL”
- Contribution of Biomass Partitioning and Translocation to Grain Yield under Sub-Optimum Growing Conditions in Irrigated Rice (2003, background): “…the supply of carbohydrate during grain filling is limited (Kobata and Takami, 1983; Sumi et al., 1996), as in cases of unfavorable conditions during grain filling, such as water deficits (Kobata and Takami, 1983), shaded conditions (Nagata et al., 2001), and low total solar radiation in our study.”