When I hear the word toxic, the first thing I think of is "relationships." It is not as though I am engaged in any toxic relationships, but so many other people seem to be. Why some people have such a hard time just weeding those out and going on with their business it is hard to say. Maybe it is just because not everyone grew up on a farm.
My long lost (but now recently revived) interest in plants forces me to start making some decisions regarding possible toxicity in the green things I want to grow. When I blogged about the vinca plants we put on the porch to see if they could withstand the summer heat, I wasn't much thinking about the fact that periwinkle is supposed to be "toxic" but when bringing them indoors for some hydroponic experiments, it dawned on me that it would be a good idea to find out whether the vinca should be isolated from from my salad greens experiments. I needed to know which of my plants were toxic and which were not.
The crisis in my learning curve occurred when I realized that almost everyone regards the leaves and stems of the tomato plant as poisonous. Of course, at one time, much of the civilized world considered even the fruit of the tomato to be poisonous, but really, the tender young leaves of a tomato plant smell heavenly to me and although I never actually ate one, I wondered "why not?" The quick version of the answer seemed to be that because the tomato belongs to the deadly nightshade family, its leaves contain a concentration of tomatine, a glycoalkaloid that is supposed to be toxic.
After completing hours, maybe days, even weeks of reading, to my amazement I had found suggestions here or there that practically ALL the plants I liked best were considered toxic by one person or another: Amaranth, purslane, lambsquarters, potatoes, eggplant, spinach. Some consider them all completely safe, yet others describe them as deadly. I'm pretty sure that in moderation none of these things would hurt the average adult human, but it seems there is no way that people are going to agree one way or another on that. Aside from simply tabling the whole inquiry, the only choice seems to be to take one side or another.
So last night, I sauntered over to my tomato project and ate a leaf. Having awakened alive with no discernable ill-effects, I guess I'll just have to keep reading and studying the issue until I get to the bottom of this. Meanwhile, here is a 3D rendition of a Deadly Nightshade molecule:
