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Plant Biology

Selected Works

2013

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Full-Text Articles in Life Sciences

Arabidopsis Thaliana Ahl Family Modulates Hypocotyl Growth Redundantly By Interacting With Each Other Via The Ppc/Duf296 Domain, Jianfei Zhao, David Favero, Hao Peng, Michael Neff Nov 2013

Arabidopsis Thaliana Ahl Family Modulates Hypocotyl Growth Redundantly By Interacting With Each Other Via The Ppc/Duf296 Domain, Jianfei Zhao, David Favero, Hao Peng, Michael Neff

Jianfei Zhao

The Arabidopsis thaliana genome encodes 29 AT-HOOK MOTIF CONTAINING NUCLEAR LOCALIZED (AHL) genes, which evolved into two phylogenic clades. The AHL proteins contain one or two AT-hook motif(s) and one plant and prokaryote conserved (PPC)/domain of unknown function #296 (DUF296) domain. Seedlings lacking both SOB3/AHL29 and ESC/AHL27 confer a subtle long-hypocotyl phenotype compared with the WT or either single-null mutant. In contrast, the missense allele sob3-6 confers a dramatic long-hypocotyl phenotype in the light. In this study, we examined the dominant-negative feature of sob3-6 and found that it encodes a protein with a disrupted AT-hook motif that abolishes binding to …

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Relationship Between Elaiosome And Efn Gland Size In Castor Bean (Ricinus Communis L.), An Exotic Mymercophyte In Southern California, Victor D. Carmona Dec 2012

Relationship Between Elaiosome And Efn Gland Size In Castor Bean (Ricinus Communis L.), An Exotic Mymercophyte In Southern California, Victor D. Carmona

Victor D. Carmona-Galindo

Castor bean (Ricinus communis L.) relies on seed dispersal by attracting ants with elaiosomes; lipid rich seed appendages, which serve as a source of food for ant larvae. Additionally, castor bean petioles and inflorescences have extra floral nectary (EFN) glands that secrete sugars that also attract ants, which in return, defend against herbivores. We propose that in order to attract ants, castor bean would have to balance allocation of energy toward plant defense and seed dispersal per the Principle of Allocation. Specifically, we hypothesized that in castor bean, an increase in elaiosome size would correspond to result in a decrease …

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The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Costal Habitats, Victor D. Carmona Dec 2012

The Impact Of Invasive Species Management Strategies On The Population Dynamics Of Castor Bean (Ricinus Communis L., Euphorbiaceae) At Two Southern California Costal Habitats, Victor D. Carmona

Victor D. Carmona-Galindo

The diverse uses of Ricinus communis L. (Castor bean) in herbalism, agriculture, and horticulture have facilitated the worldwide dispersal of this r-selected species. Management strategies to eradicate R. communis in southern California have largely relied on manual labor, which in turn is limited by budget. This study assesses how two different invasive species management strategies in southern California impact the survivorship and fecundity of naturalized R. communis populations. Our findings suggest that documenting patterns of survival and reproduction serve as a tool for the adaptive management of invasive species eradication efforts.

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