State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.
State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, 1 Weigang, Nanjing, 210095, China.
Plant Physiol Biochem. 2018 Jun;127:310-319. doi: 10.1016/j.plaphy.2018.04.003. Epub 2018 Apr 4.
Carbon dioxide (CO) is an important regulator of plant growth and development, and its proportion in the atmosphere continues to rise now. Lignin is one of the major secondary products in plants with vital biological functions. However, the relationship between CO level and xylogenesis in celery is still unknown. In order to investigate the effects of increasing CO concentration on lignin accumulation in celery, 'Jinnanshiqin' were exposed to two CO applications, 400 (e) and 1000 μmol mol (e), respectively. Plant morphology and lignin distribution in celery plants treated with elevated CO did not change significantly. There was an upward trend on lignin content in celery leaves, and the transcript abundance of 12 genes involved in lignin metabolism has altered in response to elevated CO. The effects of high level of CO on different tissues were different. Our works confirmed that CO may play an important role in lignin accumulation in celery leaves. The current study will offer new evidence to understand the regulation mechanism of lignin biosynthesis under elevated CO and provide a reference to improve celery quality by adjusting the growth environment.
二氧化碳（CO）是植物生长和发育的重要调节剂，其在大气中的比例现在持续上升。木质素是植物中主要的次生产物之一，具有重要的生物学功能。然而，大气 CO 水平与芹菜木质素形成之间的关系尚不清楚。为了研究升高 CO 浓度对芹菜木质素积累的影响，分别将‘金南实芹’暴露于 400（e）和 1000μmol·mol（e）的 CO 中。暴露于升高的 CO 中的芹菜植物的植物形态和木质素分布没有明显变化。芹菜叶片中的木质素含量呈上升趋势，参与木质素代谢的 12 个基因的转录丰度也因升高的 CO 而发生改变。CO 对不同组织的影响不同。我们的研究工作证实，CO 可能在芹菜叶片木质素积累中起重要作用。本研究将为理解在升高的 CO 下木质素生物合成的调控机制提供新的证据，并为通过调节生长环境来提高芹菜品质提供参考。
