Abstract
Uniconazole (UNZ) can alleviate a variety of abiotic stresses such as low temperature. With application of UNZ on Coix lachryma‐jobi L. (coix) under low‐temperature stress, growth and physiological parameters were investigated in seedlings. Meanwhile, transcriptome profile in coix seedlings was characterized as well. The results showed an increase of 11.90%, 13.59%, and 10.98% in stem diameter, the aboveground and belowground biomass in 5 mg/L uniconazole application group (U3), compared with control check low‐temperature group (CKL). Some anti‐oxidase activities also show significant difference between CKL and U3 (p < .05). Transcriptome results showed that 3,901 and 1,040 genes had different expression level at control check (CK) and CKL, CKL and U3. A considerable number of different expressing genes (DEGs) related to the plant hormone signal transduction, photosynthesis, reactive oxygen species (ROS)‐related genes, and secondary metabolism in response to uniconazole application were identified in this study. The transcriptomic gene expression profiles present a valuable genomic tool to improve studying the molecular mechanisms underlying low‐temperature tolerance in coix. At the same time, it would provide a certain basis for the application of UNZ in the production of coix resistance under low temperature.
Highlights
Coix, commonly known as Job's tears, is an annual crop that has long been consumed as both a herbal medicine and a nourishing food (Lin & Li, 2016)
It provided some references for the coix cultivation in Heilongjiang and other cold regions
Comparing to the check low-temperature group (CKL), the plant stem diameter was increased by 11.90%, lateral root numbers increased by 31.04%, and the aboveground and belowground biomass increased by 13.59% and 10.98%, respectively (Table 1), while plant height and root length were decreased by 6.62% and 7.95%, respectively
Summary
Commonly known as Job's tears, is an annual crop that has long been consumed as both a herbal medicine and a nourishing food (Lin & Li, 2016). Coix is a nourishing food containing 16.2% proteins, 4.65% lipids, and 79.17% carbohydrates (Kim et al, 2004). Modern scientific studies demonstrate that adlay seeds have exhibited antitumor (Lu, Zhang, Jia, Wu, & Lu, 2011), anti-inflammatory (Chen, Chung, Chiang, & Lin, 2011), and anti-allergic properties (Chen, Shih, Hsu, & Chiang, 2010). Temperature greatly affects the growth and development of crops. When crops are exposed to low-temperature stress, the growth and production may be suppressed in some crops
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