Aspterric acid is a carotene-type sesquiterpene, plant growth regulator, and inhibitor of pollen development originally isolated from the fungus A. terreus.[1] [2] It inhibits pollen development, reduces stem length at first flowering, and increases the time to bolting and first flowering in A. thaliana when used at a concentration of 38 μM. Aspterric acid exerts its effects on reproductive growth in A. thaliana without inhibiting biosynthesis and transport of the plant growth regulator indole-3-acetic acid .[2]
Reference:
[1]. Shimada, A., Kusano, M., Takeuchi, S., et al. Aspterric acid and 6-hydroxymellein, inhibitors of pollen development in Arabidopsis thaliana, produced by Aspergillus terreus. Z. Naturforsch. C. 57(5-6), 459-464 (2002).
[2]. Shimada, A., Yamane, H., and Kimura, Y. The role of aspterric acid in auxin-regulated reproductive growth of Arabidopsis thaliana. Z. Naturforsch. C. 63(7-8), 554-556 (2008).