biostudies-literatureSilva FANational Science Foundation1100https://www.ebi.ac.uk/biostudies/studies/S-EPMC6077755biostudies-literatureUnknown9We have evaluated the floral nectars of nine species from different sections of the genus <i>Nicotiana</i>. These nine species effectively cover the genus. We found that the nectary glands from these different species showed similar developmental regulation with swelling of nectaries during the first half of development and a distinct color change in the nectary gland as development approaches anthesis. When we examined the composition of the nectar from these nine different species we found that they were similar in content. Carbohydrate compositions of these various nectars varied between these species with <i>N. bonariensis</i> showing the highest and <i>N. sylvestris</i> lowest level of sugars. Based upon the amount of carbohydrates, the nectars fell into two groups. We found that hydrFrontiers in plant scienceNectar Analysis Throughout the Genus <i>Nicotiana</i> Suggests Conserved Mechanisms of Nectar Production and Biochemical Action.PMC6077755NSF#1339246Thornburg RSilva FAGuirgis AfalseNectar Analysis Throughout the Genus <i>Nicotiana</i> Suggests Conserved Mechanisms of Nectar Production and Biochemical Action.We have evaluated the floral nectars of nine species from different sections of the genus <i>Nicotiana</i>. These nine species effectively cover the genus. We found that the nectary glands from these different species showed similar developmental regulation with swelling of nectaries during the first half of development and a distinct color change in the nectary gland as development approaches anthesis. When we examined the composition of the nectar from these nine different species we found that they were similar in content. Carbohydrate compositions of these various nectars varied between these species with <i>N. bonariensis</i> showing the highest and <i>N. sylvestris</i> lowest level of sugars. Based upon the amount of carbohydrates, the nectars fell into two groups. We found that hydr2018-01-01T00:00:00Z20182026-04-08T01:54:52.549Z2019-03-26T23:51:16ZS-EPMC60777553010504210.3389/fpls.2018.01100