|Table of Contents|

Effects of Plant Growth Regulator on Cutting Propagation of Platycladus orientalis Franco and Adventitious Root Formation

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2020年10
Page:
77-86
Research Field:
Publishing date:

Info

Title:
Effects of Plant Growth Regulator on Cutting Propagation of Platycladus orientalis Franco and Adventitious Root Formation
Author(s):
ZHAO Jinzhe1; 2; LIU Guobin1; ZHANG Hongling2; CAO Jun1; ZHANG Yuping1; LIAO Ting1
(1.Beijing Academy of Forestry and Pomology Sciences,Beijing 100093；2.College of Forest,Inner Mongolia Agricultural University,Hohhot,Inner Mongolia 010018)
Keywords:
Platycladus orientalis (L.)Franco; cutting progagation; adventitious roots; organization structure
PACS:
-
DOI:
10.11937/bfyy.20192458
Abstract:
With one-year-old semi-lignified cutting of P.orientalis ‘Liye’ and P.orientalis ‘Dieye’ as materials,the effects of different plant growth regulators (including IBA,NAA,m (IBA)∶m (NAA)=1∶1 and GW) and its different concentration levels (including 100,200,300,400,600,800,1 000,1 500,2 000,2 500,3 500,4 500 mg·L-1) on rooting of cuttings by completely random combination test under rapid dipping (10 seconds) and soaking (4 hours) treatments were studied,and seedling effects of different treatments were comprehensively evaluated by membership function method.The aim was to choose the best combination of rooting treatments to improve the seedling raising effect and efficiency.At the same time,the tissue structure of cutting base was observed during the rooting process using paraffin sectioning technology,and the internal structure changes and adventitious root formation of cuttings during the rooting process were revealed.The results showed that the highest rooting rate of P.orientalis ‘Liye’ and P.orientalis ‘Dieye’ were 92.22% and 56.67% after treatment with 2 000 mg·L-1 IBA for 10 seconds.The comprehensive evaluation of membership functions showed that 800 mg·L-1 IBA immersion for 4 hours was the best combination for cutting seedlings of Platycladus orientalis ‘Liye’,and 2 000 mg·L-1 IBA quick dipping for 10 seconds was the best combination of P.orientalis ‘Dieye’ cuttings.Anatomical results showed that the root primordia of P.orientalis was produced by induction,and adventitious roots occurred mostly in callus.A few adventitious roots occurred at the intersection of pith ray and phloem,and the rooting cycle last about 100 days.

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Last Update: 2020-07-25