Cell collapse on Paph Maudiae?

[nzadro]

Hello friends,

I recently moved to a new apartment with southeastern exposure windows. Previously it was northeastern, so a few hours of direct sun in the early morning.

So far, all of my plants, including the windowsill orchids, are happy & drinking up the sun.

This brings me to my concern:
I was just washing plant leaves (just some water and a touch of soap, since it is dusty with all the moving) and noticed some pitting on the leaves on my Paph Maudiae.

I wonder if the more intense light was too quick of a transition? I checked the plant over and I can see no mites or other pests. I can unpot if I will need to. No other orchid has this issue, but I have isolated just in case.

So, I did a quick search and have found the possibility of cell collapse causing the pitting due to higher light. The newest leaf is unaffected. Thoughts?

Images included in the post.
Thanks in advance for your input.
Natalie.

[Ray]

Well...it doesn't look like sunburn at this point, but could be slight dehydration, due either to overheating or underwatering (or bad roots, which yields the same result).

[nzadro]

Originally Posted by Ray

Well...it doesn't look like sunburn at this point, but could be slight dehydration, due either to overheating or underwatering (or bad roots, which yields the same result).

Thanks for your reply, Ray.

I make sure to keep the paph medium (bark, perlite, leca balls, and some spagh bits) moist. Gets watered nearly everyday now, since the medium dries out quicker in the hot weather we have been having. With this setup, could dehydration be an issue?

When I repotted the paph a couple months ago, the roots looked good. I can unpot to make sure everything is alright.

[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.

[Ray]

Originally Posted by SouthPark

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.

I agree 100%

[nzadro]

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.

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.