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Ontario, Canada.

Building on Savage's Sink Source Relationship. Sieve tubes are the transporters of fluid into the stem and pumpkin. Seams to say > Add plenty of K early on for a bigger stem. Thinking its Prolly wise to ensure maximum Solubility of K well before the fruiting bud develops?

https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/sieve-tube

4/12/2023 5:31:20 PM

Ontario, Canada.

Explain sieve tubes? Chatting with Bing > explain how selective breeding changed the phloem of Cucurbita maxima?
So AI got me this answer on my 7th try it narrowed down the main point pretty darn good.

In her research paper “The making of giant pumpkins: how selective breeding changed the phloem of Cucurbita Maxima from source to sink,” Jessica Savage explains how selective breeding changed the phloem of Cucurbita maxima from source to sink. She found that the phloem of giant pumpkins has more and larger sieve tubes than that of smaller pumpkins, which allows for more efficient transport of sugars and other nutrients. I hope this helps. Let me know if you have any other questions.

5/2/2023 9:12:49 PM

Ontario, Canada.

more and larger sieve tubes than that of smaller pumpkins

5/3/2023 7:58:21 AM

Ontario

Basically it means that you're looking for the fastest transportation of fluid, so the goal is to either increase the flow rate by increasing pressure, or increasing the size of "hose" that's its traveling through, and the genetic breeding of giants has caused it to increase the size of its "hoses"?

5/3/2023 8:23:04 AM

Grittyville, WA

I think the plants naturally adjust the size of their plumbing so that the phloem flow rate is relatively constant. I researched that for tomatoes, and basically the phloem cant flow faster, but the piping can get bigger. That was the general impression I got.

5/3/2023 12:25:22 PM