Mucilage is not a barrier to seed germination. It has important functions such as tolerance of water stress, competition via allelopathy, or facilitation of germination through attachment to soil particles :)

Thank you

But when imbibition, it blocks oxygen.

Hi Shahin. I think it's only a problem if there is EXCESS water.

Article Integumentary Mucilage as an Oxygen Barrier During Germinati...

You can refer to:

https://www.jstor.org/stable/4042251?seq=1#page_scan_tab_contents

You can refer to:

Young, James A., and Raymond A. Evans. “Mucilaginous Seed Coats.” Weed Science, vol. 21, no. 1, 1973, pp. 52–54. JSTOR, JSTOR, www.jstor.org/stable/4042251.

Thank you

Paper is not available

Shahin Daneshmandi

The seeds of Carica papaya are covered by mucilaginous membrane that present inhibitory substances responsible for the control of germination. See two articles on the subject. Maybe these articles can help you.

Article Compostos fenólicos inibidores da germinação em sementes de ...

http://oaji.net/articles/2015/2238-1445529633.pdf