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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Jennifer Nemhauser, Todd Mockler, and Joanne Chory at the Plant Biology Laboratory of the Salk Institute for Biological Studies per- formed experiments to learn more about the interaction of auxin and brassinosteroids (BR) in regulating the growth of Arabidopsis seedlings. In a 2004 research report on this work, graphics for displaying experimental data included the Venn diagram shown here (Figure). Venn diagrams are useful for giving a snapshot of the interrelation- ships between sets of data, often using overlapping circles. In this diagram, “up” and “down” refer to hormone effects that stimulate or inhibit gene expression. The numerals in each circle represent numbers of seedlings.

Chapter 37, Problem 2ITD, Jennifer Nemhauser, Todd Mockler, and Joanne Chory at the Plant Biology Laboratory of the Salk

FIGURE Venn diagram showing the overlap between Yucca genes responsive to auxin and BR.

Describe at least two other general findings summarized in the diagram.

Source: J. Nemhauser, T. Mockler, and J. Chory. 2004. Interdependency of brassinosteroids and auxin in Arabidopsis seedling growth. PLoS Biology 2:1460–1471. doi: 10.1371/journal.pbio.0020258

Summary Introduction

To review:

At least two general findings summarized in the diagram.

Biology: The Dynamic Science (MindTap Course List), Chapter 37, Problem 2ITD

Introduction:

In the given study, the role of auxin and brassinosteroids in regulating the plant growth in Arabidopsis seed is made. A Venn diagram is used for representing the relative proportion of auxin-responsive and BR-responsive genes, and the degree of overlap of the two genes. In this case, the genes observed for the response of the two phytohormones are Yucca genes.

Explanation

A Brassicaceae family plant, Arabidopsis, is used for conducting the plant study. These plants are small, and are found related to cabbage and mustard. The Yucca genes are responsible for encoding a flavin monooxygenase-like enzyme. The general findings that are observed from the Venn diagram are as follows:

1. It can be observed that brassinosteroids have a larger impact on the Yucca genes up and down signaling, in comparison to auxins...

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