Pollen cone teratologies in Sequoia sempervirens (D. Don) Endl. and Widdringtonia nodiflora (L.) Powrie (Cupressaceae) in the light of conifer evolution

2019 ◽  
Vol 130 (4) ◽  
pp. 337-345
Author(s):  
Veit Martin Dörken ◽  
Thomas Stützel
Keyword(s):  
Sequoia Sempervirens ◽  
Pollen Cone

scholarly journals Aboveground biomass dynamics and growth efficiency of Sequoia sempervirens forests

2020 ◽  
Vol 458 ◽  
pp. 117740 ◽  
Author(s):  
Stephen C. Sillett ◽  
Robert Van Pelt ◽  
Allyson L. Carroll ◽  
Jim Campbell-Spickler ◽  
Marie E. Antoine
Keyword(s):  
Aboveground Biomass ◽  
Growth Efficiency ◽  
Sequoia Sempervirens ◽  
Biomass Dynamics

scholarly journals VEGETATIVE RESCUE AND ROOTING OF CUTTINGS OF DIFFERENT STOCK PLANTS OF Sequoia sempervirens

CERNE ◽  
2017 ◽  
Vol 23 (4) ◽  
pp. 435-444 ◽  
Author(s):  
Mariane de Oliveira Pereira ◽  
Alessandro Camargo Ângelo ◽  
Marcio Carlos Navroski ◽  
Mario Dobner Júnior ◽  
Luciana Magda de Oliveira
Keyword(s):  
Genetic Effect ◽  
Sequoia Sempervirens ◽  
Stem Cuttings ◽  
Fast Growing ◽  
Rooting Of Cuttings ◽  
Living Species ◽  
Recovered Material ◽  
Over 40 Years ◽  
Number Of Shoots

ABSTRACT Sequoia is a fast-growing, long-living species, producing durable timber. The aim of this study was to test different methods for the vegetative rescue of Sequoia sempervirens trees over 40 years old, made at different periods of the year, and, later, testing the rooting of individualized cuttings in planned arrays. Twenty-four individual sequoias were rescued, applying girdling and semi-girdling at three different heights (-10, 0, and 30 cm). The first collection was made 90 days after application of the treatments, being repeated at 150, 240, and 360 days. The percentage of budding trees and the number of shoots per array were registered. In all collections, shoots produced cuttings, which were placed for rooting in mini-tunnels. Cutting survival (%), rooting (%), and number of roots were registered, per array, and per collection. The species vegetative rescue proved to be efficient for the production of shoots for stem cuttings, especially with girdling at 30 cm and semi-girdling at -10 cm. However, it is difficult to define the best method, mainly because of the genetic effect among stock plants. The rooting of cuttings, of recovered material, presented good results (average >65%), also with great differences among stock plants. The potential for rooting of cuttings varied according to different planting periods, with high rooting rates in all seasons, especially in summer. Sequoia sempervirens shows the potential for vegetative rescue and cloning by rooting of cuttings, and this may lead to new studies, with a view towards fixing clones.

scholarly journals RESGATE E PROPAGAÇÃO VEGETATIVA DE Sequoia sempervirens

FLORESTA ◽  
2014 ◽  
Vol 45 (2) ◽  
pp. 383 ◽  
Author(s):  
Márcio Carlos Navroski ◽  
Mariane De Oliveira Pereira ◽  
André Felipe Hess ◽  
Raul Silvestre ◽  
Alessandro Camargo Ângelo ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Vegetative Propagation ◽  
Indole Acetic Acid ◽  
Good Option ◽  
Sequoia Sempervirens ◽  
Southern Brazil ◽  
Clonal Forestry ◽  
Rooted Cuttings ◽  
Clonal Multiplication ◽  
Conventional Breeding

Objetivou-se com o estudo verificar resgate vegetativo, enraizamento de estacas e adaptação das mudas enraizadas em sistema de minijardim clonal de Sequoia sempervirens. Realizou-se a decepa de cinco indivíduos com 20 anos de idade e após foi contabilizada a capacidade de emissão de brotações. Com as brotações, foram confeccionadas estacas, as quais foram submetidas a diferentes concentrações de ácido indolacético (AIA) (0, 2000, 4000 e 6000 mg.L-1). Foram avaliadas a porcentagem de enraizamento e o número e comprimento de raízes 160 dias após o estaqueamento. O experimento foi instalado em DIC, com 5 repetições de 10 estacas. Após a formação das mudas com as estacas enraizadas, elas foram transplantadas para vasos, para a formação do minijardim clonal. O resgate vegetativo através da decepa de árvores apresentou potencialidade para produção de estacas de sequoia e revigoramento do material. O uso entre 2000 e 4000 mg.L-1 de AIA aumentou a porcentagem de enraizamento e também o número e comprimento de raízes formadas. O minijardim clonal de sequoia mostrou ser uma boa opção para a multiplicação clonal da espécie. A clonagem da sequoia pode auxiliar tanto no melhoramento convencional como em plantios comerciais da espécie, principalmente no Sul do Brasil, local onde encontra condições adequadas para seu crescimento.Palavras-chave: Silvicultura clonal; coníferas; rejuvenescimento; minijardim clonal. AbstractRescue and vegetative propagation of Sequoia sempervirens. The objective of the study to verify the vegetative rescue, rooting cuttings and rooted plants adapt in mini-clonal hedge of Sequoia sempervirens system. Was held coppicing five individuals aged 20 years old and was recorded after the ability to shoot emission. Shoots with different concentrations of indole acetic acid were applied (IAA) (0, 2000, 4000 and 6000 mg.L-1) in cuttings made by evaluating the percentage of rooting, number and length of roots 160 days after striking. The experiment was a completely randomized with five replicates of 10 cuttings. After the formation of seedlings with rooted cuttings, these were transplanted to pots for the formation of mini-clonal hedge. The vegetative rescue through coppicing trees showed potential for the production of cuttings sequoia and reinvigoration of the material. The use from 2000 to 4000 mg.L-1 IAA increased rooting percentage and the number and length of roots formed. The mini-clonal hedge of sequoia proved to be a good option for clonal multiplication of the species. Cloning of sequoia can help both conventional breeding and for commercial plantations of the species, especially in southern Brazil, where finds suitable conditions for their growth.Keywords: Clonal forestry; conifers; rejuvenation; mini-clonal hedge.

Effects of Different Substrate Ratios on the Growth and Physiology of Sequoia sempervirens Container Seedlings

2019 ◽  
Vol 27 (3) ◽  
pp. 169-177 ◽  
Author(s):  
Ge-Lei Meng ◽  
Dong-Tao Luan ◽  
Zhi-Juan Tai ◽  
Ji-Feng Deng ◽  
Jian-Qiu Han ◽  
...  
Keyword(s):  
Sequoia Sempervirens ◽  
Container Seedlings

Processes Underlying Discoloration of Redwood(Sequoia sempervirens)during Drying and in Use

Holzforschung ◽  
1962 ◽  
Vol 16 (1) ◽  
pp. 11-17 ◽  
Author(s):  
Eugene Zavarin ◽  
Leslie V. Smith
Keyword(s):  
Sequoia Sempervirens
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