Seasonal changes in adventitious root formation in hypocotyl cuttings of Pinus sylvestris: Influence of Photoperiod during stock plant growth and of indolebutyric acid treatment of cuttings

1982 ◽  
Vol 54 (2) ◽  
pp. 99-106 ◽  
Author(s):  
Jurgen Hansen ◽  
Arild Ernstsen
Keyword(s):  
Plant Growth ◽  
Pinus Sylvestris ◽  
Seasonal Changes ◽  
Adventitious Root ◽  
Acid Treatment ◽  
Root Formation ◽  
Adventitious Root Formation ◽  
Stock Plant ◽  
Indolebutyric Acid ◽  
Hypocotyl Cuttings

Effect of polar auxin transport and gibberellins on xylem formation in pine cuttings under adventitious rooting conditions

2020 ◽  
Vol 67 (1-2) ◽  
pp. 27-39 ◽  
Author(s):  
Alberto Pizarro ◽  
Carmen Díaz-Sala
Keyword(s):  
Adventitious Root ◽  
Root Formation ◽  
Auxin Transport ◽  
Adventitious Rooting ◽  
Adventitious Root Formation ◽  
Polar Auxin Transport ◽  
Root Induction ◽  
Xylem Differentiation ◽  
Xylem Formation ◽  
Hypocotyl Cuttings

Maturation-related decline of adventitious root formation is one of the major factors affecting adventitious rooting in forest tree species. We demonstrate that inhibition of polar auxin transport promoted cambium and xylem differentiation in rooting-competent hypocotyl cuttings from Pinus radiata under conditions of adventitious root formation. Treatments with bioactive gibberellins inhibited rooting while at the same time inducing both the differentiation of a continuous ring of cambium and xylem formation. Treatments with inhibitors of gibberellin biosynthesis did not affect the rooting response. The results demonstrate that xylem parenchyma and procambial cells at the xylem poles of rooting-competent hypocotyl cuttings after excision and under conditions of adventitious root induction become adventitious root meristems or xylem, depending on the directional auxin flow. Gibberellin may interact with this pathway, inducing xylem differentiation and inhibiting rooting. We conclude that modifications of auxin flow at the rooting sites, and the priming of cambial cells to differentiate into xylem during tree ageing, may be associated with the maturation-related decline of adventitious root formation.

Leaf removal reduces scion adventitious root formation and plant growth of grafted tomato

2017 ◽  
Vol 214 ◽  
pp. 147-157 ◽  
Author(s):  
Lani J. Meyer ◽  
Megan M. Kennelly ◽  
Eleni D. Pliakoni ◽  
Cary L. Rivard
Keyword(s):  
Plant Growth ◽  
Adventitious Root ◽  
Root Formation ◽  
Adventitious Root Formation ◽  
Leaf Removal
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