Quote:
Originally Posted by SouthPark
NZ -- cell collapse can happen if there are two significantly different temperatures (eg. T1 and T2), and the leaf temperature changes from T1 to T2 relatively quickly..... or vice versa (T2 to T1). So if we can think of ways how leaf temperature (or portions of leaf) could change relatively quickly - such as warm leaves taken into a cold place abruptly, or cold water placed on warmed leaves, etc ....... then cell collapse could occur.
I think that some cell collapse doesn't necessarily mean disaster or issues. If that part doesn't rot, and just stays like that, then it should be no problem at all.
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Many thanks for that explanation, SP! It makes sense. I thought i had to do with extreme changes in light, which could also mean excessive heat. I will continue to research and see what else I can find that relates to this pitting. This looked closest to me when I referenced some images. I'll also keep an eye out for pests, though I have yet to spot any anywhere.
nzadro 
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