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Hello bovine421,Brassinolide enhances cold stress tolerance of fruit by regulating plasma membrane proteins and lipids with 10 μM brassinolide (BL) showed a higher tolerance to cold temperature of 5 °C.https://link.springer.com/article/10.1007%2Fs00726-012-1327-6These hormones control the division, elongation and differentiation of various cell types throughout the entire plant life cycle.https://link.springer.com/article/10.1007/s10725-020-00647-8Further reading:https://bp.ueb.cas.cz/pdfs/bpl/2018/04/01.pdf
Gerrberaric Acid does increase internode on mango. I used it on my seedlings and the internodes between leaves are very long. The stems are quite thin from stretching.