what causes leaves in tomatoes to be turgid/rigid but not showing signs of wilting?

Tomato    Nairobi-kenya

I am helping in a research on tomatoes response to various rates of fertilizers that are a combination of organic and inorganic fertilizers and lately while collecting data, I have realized that some plants have rigid leaves but do not show signs of wilting, so am left to wonder if that is an early symptom of a disease though I have not yet carried out any tests on the crops. someone please help me try to diagnose this abnormality.

Posted by: emmanuel Luseno (2 points) emmanuel Luseno
Posted: October 3, 2016


Wilting is most commonly associated with a loss of water as the guard cells surrounding the openings on the leaf (stomata) lose their water and thus rigid nature. Of course some pathogens can affect this and some disease agents (fungi) can even manipulate the plant to keen the guard cells open as this is the way that the pathogen enters the plant (through the stomata).

If you are doing research you need to measure the level of rigid leaves between your treatments and test for an effect with the appropriate test. Be careful about bias and anecdotal observations that often leads us to find an effect when it is not there.

Posted by: David Hughes (51 points) David Hughes
Posted: October 3, 2016

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