PARENT SESSION
Poster Session 12: Physiology
Tuesday, August 9, 5:00 PM - 6:30 PM, Exhibit Hall 220 A-E, Level 2, Palais des congrès de Montréal

Phytohormonal change scaling relationships in population of Arabidopsis thalinia.

hao, Zhang¹, Gen-xuan, Wang, ¹ College of life sciences , Zhejiang University, Hangzhou, Zhejiang province, China

ABSTRACT- Phytohormone, such as abiscisic acid (ABA), ethane (ETH), cytokinin (CTK), auxin (IAA) and gibberellins (GA), are molecular signals that trigger and regulate germination, growth, development, defense, response to abiotic or biotic stress. It is hypothesized that the series of mutants about phytohormone may modulate scaling exponents, which is important to integrate gene, metabolism, individual traits with population. In this study, the different scaling relationships were examined in series of mutants of abi1-1 (insensitive to ABA), era1-2 (hypersensitive to ABA), 3750 (insensitivity to CTK), 3751(insensitivity to CTK), 8052 (insensitivity to ETH) and 8053 (insensitivity to ETH) in Arabidosisis thaliana. The value of scaling exponents changed (slope also become steeper or wilder) with the sensitivity to phytohormone in the mutants of Arabidopsis, which is consistent with their metabolic traits. The results mean that the scaling rule in populations may be modulated by their individual sensitivity to signals stimulated by environmental stress (such as ABA, ETH, CTK) in plants.

Key words: Metabolism, Phytohormone, Scaling relationship, Population