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Updated: Aug 15, 2025

Efficient Polyethylene Glycol PEG Mediated Transformation of the Moss Physcomitrella patens
Published on: April 19, 2011
Autophagy modulates growth and development in the moss Physcomitrium patens
Georgina Pettinari1,2, Juan Finello2, Macarena Plaza Rojas2
1Unidad Ejecutora de Doble Dependencia INTA-CONICET (UDEA), Córdoba, Argentina.
Autophagy, a cellular process, is crucial for the development of the moss Physcomitrium patens. Loss of autophagy impacts 2D and 3D growth, affecting colony spread and reproductive development.
Area of Science:
- Plant Biology
- Cellular Biology
- Developmental Biology
Background:
- The moss Physcomitrium patens exhibits continuous cell division in apical growing protonemal cells, making it a model for studying autophagy in multicellular tissues.
- Autophagy is a fundamental cellular process involved in degradation and recycling of cellular components, essential for development and stress response.
Purpose of the Study:
- To investigate the role of autophagy in the development of Physcomitrium patens.
- To characterize the growth and development of autophagy-deficient mutants (atg5 and atg7) under varying conditions.
Main Methods:
- Utilized Physcomitrium patens as a model organism.
- Generated and analyzed atg5 and atg7 loss-of-function mutants.
- Assessed 2D and 3D growth under optimal and nutrient-deprived conditions.
Main Results:
- The core autophagy machinery is present in P. patens.
- Autophagy differentially modulates 2D growth (chloronema and caulonema) based on cell type, position, and growth conditions.
- Absence of autophagy promotes 2D colony spread at the expense of 3D growth (buds, gametophores), impacting reproductive phases.
Conclusions:
- Autophagy plays a significant role in apical growth in P. patens.
- Autophagy exhibits differential responses across cell types within the same tissue.
- Autophagy is essential for life cycle progression and the development of both 2D and 3D tissues in P. patens.
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