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Fitness consequences of altering floral circadian oscillations for Nicotiana attenuata

Journal of Integrative Plant Biology 2017年第3期59卷 180-189页

作者： Felipe Yon Danny Kessler Youngsung Joo lucas cortes llorca Sang-Gyu Kim Ian T. Baldwin Department of Molecular Ecology Max Planck Institute for Chemical Ecology Hans-Knoll-Straβe 8 D-07745 Jena Germany Center for Genome Engineering Institute for Basic Science Yuseong-gu 34047 Daeieon South Korea

Ecological interactions between flowers and pollinators are all about timing. Flower opening/closing and scent emissions are largely synchronized with pollinator activity, and a circadian clock regulates these rhythms. However, whether the circadian clock increases a plant＇s reproductive success by regulating these floral rhythms remains untested. Flowers of Nicotiana attenuata, a wild tobacco, diurnally and rhythmically open, emit scent and move vertically through a 140° arc to interact with nocturnal hawkmoths. We tethered flowers to evaluate the importanceof flower positions for Manduca flower position dramatically sexta-mediated pollinations; nfluenced pollination. We examined the pollination success of phase-shifted flowers, silenced in circadian clock genes, NaZTL, NaLHY, and NaTOCI, by RNAi. Circadian rhythms in N. attenuata flowers are responsible for altered seed set from outcrossed pollen.

关键词： Yonggen Lou Zhejiang University China

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Jasmonate signaling makes flowers attractive to pollinators and repellant to florivores in nature

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Journal of Integrative Plant Biology 2018年第3期60卷 190-194页

作者： ran li meredith c.schuman yang wang lucas cortes llorca julia bing anne bennion rayko halitschke ian t.baldwin department of molecular ecology max planck institute for chemical ecologyHans-Knoll-StraBe 8D-07745 JenaGermany department of microbiology and molecular biology brigham young university4007BLSBProvoUT 84602USA

Flowers are required for the Darwinian fitness of flowering plants, but flowers＇ advertisements for pollination services can attract florivores. Previous glasshouse work with Nicotiana attenuata revealed the role of jasmonate （JA） signaling in flower development, advertisement and defense. However, whether JA signaling mediates flowers＇ filtering of floral visitors in nature remained unknown. This field study revealed that silencing JA signaling resulted in flowers that produce less nectar and benzyl acetone, two pollinatorattractive traits. Meanwhile, flowers of defenseless plants were highly attacked by a suite of native herbivores, and damage to buds in native plants correlated negatively with their JA-lle levels.

关键词： EV JA Figure Jasmonate signaling makes flowers attractive to pollinators and repellant to florivores in nature

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