For ZnO most of the citrus fruit plants act as reducing agent meaning you can use lime extract, orange extract. 

Aloe vera , hibiscus rosasinensis can also be used.

Thanks alot Dear Jyoti Mayekar

Thanks you Peter and Michael

[email protected] @alaudin

Plant rich with polyphenols are excellent

Thanks Zahir

Plants rich in antioxidants are active in Ag NPs synthesis

Usually medicinal plant are active

Yes you are right Fazal Hussain

Plants rich in sterols, flavonoids, saponins, tannins and alkaloids etc are the best

Yeah I have tried it. Gave excellent result

Plants like Medicago, Convolvulus and Durenta family are the best choice

I have already used Medicago polymorpha

And also Convolvulus

Use a series of local plant from 10 to 15. Then select the one which give you change in color very rapid

Yes ofcourse will do as

Check articles that show the amount of biochemical active compounds (such as polyphenols) in parts of some plants.

If no articles available. Than ? Abdounasser Omar

I would then try the greenery part of a local plant which presents in appreciable quantities around (profitability) or one which some of its parts are considered as an environmental concern. Muhammad Ismail

In water or organic solvent ?

I would prefer using water

Thanks

Yes water will be best.

I would prefer using water too.

1- Water is a green solvent

2- Water is easily available in large excess

3- Water is cost effective

Yes agree with @Sami Khan

Mostly medicinal are active for biosynthesis

Every medicinal plant is not active

Not every but more than 70% are active

Most of them are active. As medicinal plants are rich in antioxidant and polyphenols which are responsible for the reduction

Our local plants have very little medicinal info

Use medicinal plant

Yes but their selection is difficult

Variety of literature is available in this regard

Dear very limited literature is available regarding our local plants

You can perform a series of experiment for all your plants. The one which give you rapid color change with silver nitrate will be best

Yes have done by this method

Do as Tahir recommend

Thanks

Plants rich in polyphenols are excellent

Exactly the plants rich in polyphenols are excellent

Tahir Saeed Khan

Thanku sir

Use Medicago

I have already used that

You can use Plant Latex

Yes thanks but latex solubility issue

Use local fruit plants

Most of that are reported

You can use bacterial strain also

Yes but plants could be handled easy

Convolvulus arvensis ?

Yar anar try karo

Alaud Din

Fazal Hussain

Convolvulus cneorum

Yes

Follow

Recommend

Thanks All

Use latex

Excellent contribution to the discussion.

Thank you