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The Physiology of Rooting Populus Cuttings
Author(s) -
OKORO O. O.,
GRACE J.
Publication year - 1976
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1976.tb03923.x
Subject(s) - cutting , softwood , hardwood , leafy , shoot , photosynthesis , botany , biology , sowing , horticulture , ecophysiology , callus
The changing levels of carbohydrates and the rates of photosynthesis in rooting Populus cuttings are described. The cuttings were planted in a sand medium, in controlled environment conditions. There was no evidence to support the view that failure to root in P. tremula was caused by insufficient carbohydrate reserves. In leafless hardwood cuttings, the carbohydrate levels were initially very high (14–19%) but fell rapidly (to 5–10%) as roots, callus or shoots developed. In leafy softwood cuttings, a steady accumulation of carbohydrate reserves was observed, rising from 5–10% on planting to 15–25% when roots had developed. One of the differences between the easy‐to‐root P. × euramericana and the hard‐to‐root P. tremula was the apparent downward transport of assimilates in P. × euramericana softwood cuttings.