Abstract
The effect of light and water on aromatic rice remain largely unclear. A pot experiment was conducted to investigate the influences of light-water treatments (CK: natural light and well-watered conditions, WS: natural light and water-stressed conditions, LL: low light and well-watered conditions, LL-WS: low light and water-stressed treatment) on yield and 2-acetyl-1-pyrroline (2AP) formation in aromatic rice. Compared with CK, the light-water treatments decreased grain yield (10.32–39.19%) due to reductions in the filled grain percentage and total dry weight, in the regulation of biomass distribution, and in the attributes of gas exchange and antioxidant response parameters. The 2AP content in grains increased in the LL treatment (5.08–16.32%) but decreased in the WS treatment compared with that in CK. The changes in 2AP were associated with changes in 2AP formation-related traits and element content. Low light and water stress led to yield declines in aromatic rice, but low light alleviated the decrease in 2AP content caused by water stress.
Highlights
The effect of light and water on aromatic rice remain largely unclear
Some studies have reported that micronutrients such as Mn and Zn contribute to the synthesis of 2AP in aromatic r ice[14,17]
Water stress leads to increases in the production of reactive oxygen species (ROS) and changes in antioxidant p arameters[27,28], and the expression of a series of genes in response to drought stress has been a ssessed[29,30]
Summary
The effect of light and water on aromatic rice remain largely unclear. A pot experiment was conducted to investigate the influences of light-water treatments (CK: natural light and well-watered conditions, WS: natural light and water-stressed conditions, LL: low light and well-watered conditions, LL-WS: low light and water-stressed treatment) on yield and 2-acetyl-1-pyrroline (2AP) formation in aromatic rice. The 2AP content in grains increased in the LL treatment (5.08–16.32%) but decreased in the WS treatment compared with that in CK. Low light and water stress led to yield declines in aromatic rice, but low light alleviated the decrease in 2AP content caused by water stress. Comparative transcriptome profiling was performed, and certain genes in rice that are expressed under low light were identified[23]. Water stress leads to increases in the production of reactive oxygen species (ROS) and changes in antioxidant p arameters[27,28], and the expression of a series of genes in response to drought stress has been a ssessed[29,30]. Drought stress during the grain filling stage can enhance the accumulation of 2AP in aromatic rice[11]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call