Backsplash...Did I find the answer? x-posted from HD. Pic included!
akl_vdb
8 years ago
last modified: 8 years ago
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Comments (13)hehe campanula, I peeked into the Rose forum and learned that I am supposed to be horribly offended by you hijacking my funki fungi thread with an unrelated malva talk (I think it was malva at least). Now I am all offended and demand cookies. (just messing with ya) Now while I am waiting for my cookies, here are two pics of malvas/lavateras we were talking about (did not want to make a new thread about it, and since PM is weird on GW, hope you see them here) Malva oregana - at least it was sold as one to me, color is more or less the pink of ordinary malva, but darker, also bloom form is more round. Got to 50 cm for me, but I suspect that it normally is much higher, ground is crap where it is growing atm. My yellow-ish lavatera - can't find the blinking label, but it grows about 2 meters straight up, pretty much like alcea in habbit, also dies to the ground and comes back from the root - everything else is pretty much lavatera-ish in appearance and behavior. I can vaguely remember that when I checked it online after I bought it, she was classified as tad tender for our climate and originating from warmer climates, either Mediterranean, either Southern US....See Morepics of tomatoes from Amish Paste x Roman Candle graft
Comments (29)But getting back to basics, we have another case that appears similar. According to Darlington (Evolution of Genetic Systems, 1958) I am sure that we could take each example, of the many that were published many years ago, and follow the trail of more recently published research that provided useful information for determining if the original conclusions were reasonable. We would probably learn a great deal about many interesting subjects. But it would be time-consuming and from my viewpoint I am handicapped by having poor access to libraries with older research journals. I expect that time would be more efficiently used by examining the original research papers and determining whether accepted scientific practices were used and thus their conclusions warranted. I am going to continue with Frankel's research because although I do not think he was a fraud or a fool I do consider that his conclusions were unwarranted. It is clear from his published comments that he knew exactly where his experimental design failed to eliminate alternative explanations. His 1956 paper was considered by van Marrewijk as having shown an effect of the grafting so I will use it as the basis for my comments. From a quick examination of recent research published by the Chinese and Japanese groups on graft-induced genetic changes I expect that, in general, similar comments could be made in relation to many of the papers published on similar subjects. Frankel's paper gives no indication that he randomized the growing of any of his plant material and thus any systematic environmental differences present were not eliminated from affecting his observations. It is normal practice to have a randomized design to account for such potential effects. Nor did he provide any description of how he classified plants as sterile versus fertile. If there was any subjectivity involved in that classification then 'blind' methods would be needed to eliminate any researcher biases (that is the person classifying the plants would not know which plant was from the experimental group and which was from the control group). And most seriously he had no control for the effect of grafting. The description in the paper indicated that the effect of grafting was severe both on the scions and on the seeds produced from them. He needed a group that was fertile scion grafted to fertile stock to be able to compare and eliminate the effects of maternal environment on the offspring. These are known in plant species and can be short-term or long-term. If he had a control group he would then have had to analyze the differences in fertility between the two groups to show that the experimental treatment had a significant effect. His research material was open-pollinated, genetically variable and thus permitted alternative explanations involving selection, etc. There was no description of how he chose the plants to provide the scions, was one plant used for all scions? were a number of plants chosen at random used? and so on. He clearly understood that his design allowed alternative explanations as he states: "For several reasons these data do not permit extensive speculation about the nature of this cytoplasmic sterility." and he went on to mention the high heterozygosity, the lack of large numbers of offspring, the possibility of distorted segregation ratios due to high seedling mortality. In my opinion his conclusions are unwarranted and although he thought, "There is a remote possibility, for instance, that nutritional deficiency, which might have been induced by grafting, might cause a disturbance in cytoplasmic enzyme activity in such a way as to lead to an increase or decrease of sterility-determining entities of the cytoplasm." I consider that is the most likely explanation (omitting the specification of enzyme activity). With hindsight, from what is known now about cytoplasmic male sterility and mitochondria, the most likely explanation is that his fertile stock had individuals with substoichiometric mitochondrial variants present and that the stress induced by grafting caused a change in proportions. That type of explanation would also help explain why the results of replicating the experiment in Petunia could fail - that is, they would fail if the fertile stock chosen did not harbour the mitochondrial variant and they would fail if the grafting was easily successful and did not provide high levels of 'stress'. If 'Rosy Morn' has spontaneously produced cytoplasmic male sterile individuals then that would be evidence that it contains individuals with substoichiometric (one variant DNA copy per every, eg 100-200 cells) quantities of the variant mitochondria. It is intersting to note that a report (Bentolila, et al)quoted "In Petunia, a single dominant nuclear gene termed Rf confers fertility to lines carrying the only known CMS cytoplasm in this genus (16)." Reference 16 is a paper by Izhar, et al and Bentolila, et al thank Izhar for providing Petunia stocks; Izhar worked with Frankel. Apparently none of the cytoplasmic male sterile lines from grafted individuals are available from Frankel's work or the other research groups. It doesn't really matter at this point whether transposons, mitochondria, viruses, plasmagenes or some as-yet-unidentified phenomena are involved. Although for Touchstone, as the graft has already been made and a variant found this does apply, in general I cannot agree that it does not matter. For example, if one is interested in genetic variation caused by a transposon then it would be easier and more efficient to begin with a stock that has an active transposon than to graft a stabilized strain in the hopes of reactivating the transposon and producing interesting genetic variants. The question returns to "does grafting cause any changes that are different from those that can be caused by alternative methods?" and "can those alternative methods be more practical/effective/efficient than grafting?" If the cytoplasmic male sterility history (Frankel) is a general example I would conclude that the answer to those two questions, in order, is no and yes....See MoreYou've got answers...I've got questions!!! (Pics)
Comments (9)Thanks ronbre, for all your thoughts, there are some good ones in there! I love my house, but there are some things that were not well thought out by us, but that was because we were living in a FEMA trailer and wanted out of it in a hurry, so we found this houseplan and built it pretty much as is from the plan. The back door and the breakfast nook and the fireplace could have used some tweaking in where they were placed, but we were in such a hurry we didn't catch that. Weren't even in the house 2 years, when we got hit by another hurricane, and flooded with 3 ft of water, so again, we were in a hurry to get it fixed and get back "home" rather than living somewhere temporarily. I have always wanted a fireplace with a mantel to decorate, and so I think it needs to be a focal point, but obviously the big tv is also a focal point. My recliners are both actually a chestnut colored leather, one is just darker than the other, as we didn't decide we wanted two when we purchased the first one, therefore they are obviously from different dye lots. =( Again, my mistake, that's what I get for being in a hurry! But I definitely want to add more seating in this room, not just move around the chairs that I have now. I need a conversation area and so that is why I am thinking two club style chairs for either side of the entertainment center or adding a loveseat. Then I could make the reading nook like you are talking about by the window!!! The ceilings are great to look at and to have "mood lighting"(DH calls it nude lighting in the bedroom...ha) but it also makes me think things have to be centered off of the ceiling, like the entertainment center or our bed for example. You answered one question about the art with the red in it. I figured it was too big for that wall, but just wanted to see what others thought. It would only have about an inch clearance around it. I am also looking for some kind of chest or demilune table for that little wall. Trying to make that DH landing spot for keys, wallet etc, instead of the bar in the kitchen. The nightstands in the bedroom are the same height, the lamp on the left is a little shorter than the one on the right, I just thought they probably shouldn't be taller than the headboard of the bed. It's not real easy to reach the lamp to turn it off from bed. I need a console/buffet, more seating, coffee table, end table, lamps, rug, artwork, drapes. Accessories, I'll worry about later. I just want to get my big pieces set first. I have "hurricane fatigue" and just want this done and pray that we will have a quiet season this year, so we can actually relax and actually enjoy our home....See Moreposting pics from an I-pad?
Comments (36)Hi folks, We've been working on some of the photo issues and here are some updates. You should be able to now upload from all mobile devices. If you are having difficulties -- such as the 'upload' button being grayed out, please contact us directly. The issue with sideways photos seems to be with mobile devices only and we're still working on that fix. If you are taking a photo from your mobile device and you are taking the photo vertically, if you rotate it before you upload it to the forum, it should appear in the correct orientation AFTER it is submitted. I know this can be confusing, but we are working on it. As far as the issue with the img src html, this seems to be somewhat random for me. I've not been able to replicate it, so I'm not sure what's going on. If you are having this issue, can you email me directly?...See Moreakl_vdb
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