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Silicon application improves caryopsis development and yield in rice.

Nanthana Chaiwong1, Benjavan Rerkasem2, Tonapha Pusadee1

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Silicon (Si) application significantly boosts rice grain yield by enhancing spikelet formation, fertility, and grain filling. This study demonstrates Si

Keywords:
Si applicationSi concentrationSi transport genecaryopsis developmentricespikelet fertility

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Area of Science:

  • Agricultural Science
  • Plant Physiology
  • Crop Science

Background:

  • Caryopsis development is crucial for grain yield in crops.
  • Silicon (Si) plays a role in plant development and stress tolerance.
  • Understanding Si's impact on rice grain yield is vital for agriculture.

Purpose of the Study:

  • To evaluate the effect of silicon (Si) on rice spikelet formation, fertility, and grain filling.
  • To determine the impact of Si on overall rice grain yield.
  • To investigate the relationship between Si concentration and yield components.

Main Methods:

  • Field experiment evaluating Si application on two rice genotypes (Chainat 1 and Pathumthani 1).
  • Measurement of yield components: spikelet number, fertility, and grain filling.
  • Analysis of Si concentration in plant tissues (shoots, flag leaf, husk).
  • Quantification of Lsi6 gene expression levels.

Main Results:

  • Si application increased grain yield by 44% in CNT1 and 23% in PTT1.
  • Si positively influenced spikelet formation, fertilization, and grain filling.
  • Higher Si concentration in plant tissues correlated with increased grain yield and components.
  • Si application significantly upregulated Lsi6 gene expression in both genotypes.

Conclusions:

  • Rice grain yield is limited by Si deficiency affecting spikelet formation, fertilization, and grain filling.
  • Si fertilization improves rice productivity by enhancing key yield-contributing processes.
  • Upregulation of Lsi6 gene expression by Si supports its role in yield improvement.
  • Si management is a viable strategy for enhancing rice production.