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Related Experiment Video

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NMR-Based Activity Assays for Determining Compound Inhibition, IC50 Values, Artifactual Activity, and Whole-Cell Activity of Nucleoside Ribohydrolases

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INTERCALARY MERISTEMATIC ACTIVITY IN THE SPOROPHYTE OF FUNARIA (MUSCI).

J C French¹, D J Paolillo

¹Section of Genetics, Development, and Physiology, Cornell University, Ithaca, New York, 14850.

American Journal of Botany

|August 25, 2018

Summary

This summary is machine-generated.

The apical region of Funaria does not contribute to seta growth; instead, a subapical intercalary meristem drives seta elongation. This finding clarifies moss sporophyte development and cell differentiation.

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Area of Science:

* Plant developmental biology
* Bryophyte (moss) reproductive biology

Background:

* Understanding the cellular mechanisms of sporophyte development in mosses is crucial for bryophyte biology.
* The specific regions and cell types responsible for seta elongation in *Funaria* have not been fully elucidated.

Purpose of the Study:

* To precisely identify the meristematic regions responsible for seta growth in *Funaria*.
* To differentiate the roles of the apical and subapical regions in sporophyte development.

Main Methods:

* Combination of marking procedures and anatomical techniques.
* Microscopic observation of cell division patterns in *Funaria* sporophytes.

Main Results:

* The apical region of the *Funaria* seta does not function as an apical meristem for seta growth.
* An intercalary meristem located in the subapical region is responsible for seta elongation.
* Distinct cell division patterns observed in apical (large, undivided endothecial cells) and subapical (elongated central cells) regions.

Conclusions:

* Seta elongation in *Funaria* is primarily driven by a subapical intercalary meristem.
* The apical region contributes to the operculum, spore sac, and apophysis.
* A transitional zone influences apophysis development, including stomate formation.