Open lizzieinvancouver opened 1 month ago
Here are the notes from the alternating, sequential, and parallel models from the phenor package:
Alternating model
Sequential model
However, Hanninen (1990) argues that not even this sequential model posited by Sarvas (1974) is sufficient;
Parallel model
I'll be adding these papers to the docs folder and also to the reference list.
@ngoj1 This is great! Can you add what models Luedeling has used? And try to combine Kramer figures with molecular understanding.
Here are the summaries for the three models explicitly mentioned in the Luedeling 2015 paper:
Chilling Hours
"The requirements are a temperature between freezing and about 45 F and a period of continuous exposure of two to three months.” “In the intermediate temperature range - 45" F to 60" F - the results of continuous exposure vary with the kind of plant, but in general, an incomplete ending of the rest occurs.” “The picture shows that trees which.had been stored at 37" F continuously for 56 to 81 days opened most of their buds, as they do after a normal winter outdoors” “With decreasing length of cold treatment below 56 days, an increasing proportion of buds remained inactive until at no exposure and at 10 days exposure only two injured buds grew feebly”
Utah Model
^ I have the summaries for the two Erez papers that these experiments on peaches were based on also summarized in the notes document.
Dynamic Model
“The Dynamic Model (Fishman et al., 1987a, 1987b) was developed in the 1980s and defined a new concept for the negation process. Winter chill is assumed to accumulate in a two-step process. Cold temperatures initially result in the formation of an intermediate chilling product; high temperatures can destroy this product. Once a critical amount of this chilling product has accumulated, it converts to a chill portion, which cannot be destroyed. A certain chill portion accumulation indicates fulfillment of chilling requirement.”
^ More information is in the notes document
Also, maybe I was too optimistic about the diagrams in the Kramer paper...
They really are just simple visualizations of the general structure of the models mentioned in this paper, though the glossary of the mathematical terms and arguments listed and formulae provided might be of good use.
@ngoj1 Wow! That was overly optimistic. I guess it's something and maybe some of. the experimental results from callose could be but on top (where x is temperature and y is something like 'callose degrades') ... but it seems to not show the accumulation or anything.
In chillR and then in phenor packages