Abstract Detail

Development and Structure

Guan, Clarice [1], Landis, Jacob [2], Valderrama, Eugenio [3], Skinner, David [4], Phillips, Heather [1], Specht, Chelsea [5].

Exploring phyllotaxis genes and one-sided spirals in Costus L.

The precise arrangement of organs on the plant shoot axis is termed phyllotaxis, which encompasses a host of morphogenic processes that position new primordia on the meristem periphery with mathematical consistency. The ginger-banana clade (Zingiberales) is a diverse and ideal setting for studying phyllotaxis, as its members exhibit different phyllotactic patterns suitable for comparative study. Of particular interest are the Neotropical spiral gingers (Costus, Costaceae), which demonstrate a unique "spiral staircase" phyllotaxis not seen in any other group. This pattern is characterized by low divergence angles and long time periods between successive organ initiations, seemingly contradicting typically held theories of phyllotactic pattern generation. Based on studies conducted in model plants like Arabidopsis and Zea, in this talk I outline bioinformatic approaches to describing genes related to phyllotaxis in several species of Costus, with particular focus on genes related to synthesis, transport, and responses to the phytohormone auxin.

1 - Cornell University, 237 Mann Drive, Ithaca, NY, 14853, United States
2 - Cornell University, School of Integrative Plant Science, Section of Plant Biology and the L.H. Bailey Hortorium, Cornell University, Ithaca, New York, 14850, USA
3 - Cornell University, Plant Biology, CALS, 510 Mann Library, Ithaca, NY, 14853, United States
4 - Le Jardin Ombragé, Tallahassee, FL, 32308, USA
5 - Cornell University, Section of Plant Biology & the L.H. Bailey Hortorium, 502 Mann Library, Ithaca, NY, 14853, United States

Keywords:
Phyllotaxis
Auxin
PIN proteins
Costus L.
Zingiberales
Costaceae
SoPIN.

Presentation Type: Oral Paper
Session: DS1, Development and Structure I
Location: /
Date: Tuesday, July 20th, 2021
Time: 10:15 AM(EDT)
Number: DS1002
Abstract ID:695
Candidate for Awards:Katherine Esau Award,Developmental and Structural Section Graduate Student Registration Award