School of Sciences, RMIT University, Melbourne, VIC, Australia.
AgriBio, Centre for AgriBioscience, La Trobe University, Bundoora, VIC 3083, Australia.
Plant Physiol Biochem. 2018 Mar;124:117-125. doi: 10.1016/j.plaphy.2018.01.012. Epub 2018 Jan 31.
The aquatic plant Azolla became increasingly popular as bioenergy feedstock because of its high growth rate, production of biomass with high levels of biofuel-producing molecules and ability to grow on marginal lands. In this study, we analysed the contribution of all organs of Azolla to the total yield of lipids at vegetative and reproductive stages and in response to stress. Triacylglycerol-containing lipid droplets were detected in all (vegetative and reproductive) organs with the highest level in the male microsporocarps and microspores. As a result, significantly higher total yields of lipids were detected in Azolla filiculoides and Azolla pinnata at the reproductive stage. Starving changed the yield and composition of the fatty acid as a result of re-direction of carbon flow from fatty acid to anthocyanin pathways. The composition of lipids, in regard the length and degree of unsaturation of fatty acids, in Azolla meets most of the important requirements for biodiesel standards. The ability of Azolla to grow on wastewaters, along with their high productivity rate, makes it an attractive feedstock for the production of biofuels.
水生植物满江红因其生长速度快、生物量高且能在边际土地上生长、能产生高生物燃料分子等特点，成为生物能源饲料的热门选择。在这项研究中，我们分析了满江红在营养生长和生殖生长阶段以及在应激条件下所有器官对总脂质产量的贡献。在所有（营养和生殖）器官中都检测到含有三酰基甘油的脂质滴，其中雄性小孢子囊和小孢子中的含量最高。结果表明，在生殖阶段，满江红和细叶满江红的总脂质产量明显更高。饥饿会改变脂肪酸的产量和组成，这是由于碳流从脂肪酸重新定向到花青素途径的结果。就脂肪酸的长度和不饱和度而言，满江红的脂质组成符合大多数生物柴油标准的重要要求。满江红能够在废水中生长，加上其高生产力，使其成为生产生物燃料的有吸引力的原料。
