The Effect Of Ambiol On Growth And Stress Tolerance Of Pinus Banksiana And Picea Mariana Seedlings Microform
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The Effect Of Ambiol On Growth And Stress Tolerance Of Pinus Banksiana And Picea Mariana Seedlings Microform
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Author : Vera Borsos-Matovina
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 1997
The Effect Of Ambiol On Growth And Stress Tolerance Of Pinus Banksiana And Picea Mariana Seedlings Microform written by Vera Borsos-Matovina and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
The Effect Of Ambiol On Growth And Stress Tolerance Of Pinus Banksiana And Picea Mariana Seedlings
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Author :
language : en
Publisher:
Release Date : 1997
The Effect Of Ambiol On Growth And Stress Tolerance Of Pinus Banksiana And Picea Mariana Seedlings written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with categories.
Genetic Polymorphism And Physiological Response To Ambiol In Half Sib Families Of Black Spruce Picea Mariana Mill B S P
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Author : Klara Vichnevetski
language : en
Publisher:
Release Date : 1999
Genetic Polymorphism And Physiological Response To Ambiol In Half Sib Families Of Black Spruce Picea Mariana Mill B S P written by Klara Vichnevetski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with categories.
Genetic polymorphism based on isozyme analysis, growth response to Ambiol (2-methyl-4-dimethylaminomethyl-5-hydroxybenzimidazole dihydrochloride) and antitranspirant properties of Ambiol were studied in 10 half-sib families of black spruce ('Picea mariana' Mill. B.S.P.). Significant stimulation of diameter growth in 4-month old black spruce seedlings was observed after a single pretreatment of seed with Ambiol and was increased by up to 49% compared to control seedling diameter. Ambiol, however, had a very limited effect on height growth of black spruce seedlings. Growth response to Ambiol was under genetic control, and faster growing half-sib families of black spruce were more responsive to diameter growth stimulation by Ambiol compared to slower growing ones. Antitranspirant properties of Ambiol were also studied in 4-month old black spruce seedlings after single pretreatment of seed. Seedlings were subjected to soil drought stress by water withholding under controlled environment conditions in a growth chamber. Ambiol had a greater effect on reducing stomatal conductance and transpiration than photosynthesis, thereby causing an increase of up to 216% in water use efficiency in seedlings subjected to mild drought stress. Physiological response to drought stress was determined to be under genetic control and faster-growing families of black spruce were less sensitive to stress and recovered faster compared to slower-grown ones. Faster-growing, drought tolerant families were more responsive to Ambiol as an antitranspirant. Although Ambiol did not decrease transpiration in severely stressed seedlings, it did accelerate the recovery process in those seedlings. Dose-effect correlation was not linear in Ambiol as a growth promoter and as an antitranspirant. Potential mechanisms involved in plant growth regulation and stress tolerance as a result of Ambiol seed pretreatment are discussed. Genetic polymorphism expressed as isozyme variation was studied in female megagametophytes of 10 black spruce families by means of starch and polyacrylamide gel electrophoreses. Twenty three loci coding for 15 enzyme systems were analyzed. Interfamily variation was observed for mean heterozygosities, mean number of alleles per locus, percentage of polymorphic loci, presence of rare and unique alleles. A strong association was revealed between mean unbiased genetic distance with morphological distance based on diameter growth variation and with physiological distance based on transpiration efficiency during mild drought stress in classes of black spruce families. This suggested that physiological variation in black spruce families was a function of genetic polymorphism. Family mean multilocus heterozygosity estimated in female megagametophytes was associated with growth, drought tolerance and response to Ambiol in 10 families of black spruce seedlings. It thus presented potential as an early selection criterion for fast growth and drought tolerance and a marker for response to Ambiol in conifers.
Physiological Responses Of Picea Mariana And Pinus Banksiana To High Temperature Microform
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Author : Stephen John Colombo
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 1996
Physiological Responses Of Picea Mariana And Pinus Banksiana To High Temperature Microform written by Stephen John Colombo and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Growth Response And Water Use Efficiency Of Pinus Banksiana And Pinus Resinosa Seedlings Under Controlled Moisture Regimes
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Author : William Graham Cole
language : en
Publisher:
Release Date : 1986
Growth Response And Water Use Efficiency Of Pinus Banksiana And Pinus Resinosa Seedlings Under Controlled Moisture Regimes written by William Graham Cole and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Jack pine categories.
Growth Nutrient Dynamics And Outplanting Performance Of Picea Mariana Mill B S P Seedlings In Response To Fertilization During The Hardening Period Microform
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Author : Joseph R. (Joseph Robert) Boivin
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2001
Growth Nutrient Dynamics And Outplanting Performance Of Picea Mariana Mill B S P Seedlings In Response To Fertilization During The Hardening Period Microform written by Joseph R. (Joseph Robert) Boivin and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
The Effect Of Photoperiod Shortening On Terminal Bud Development And Quality In Pinus Banksiana Picea Mariana And Picea Glauca
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Author : Sarah M. Miller
language : en
Publisher:
Release Date : 2016
The Effect Of Photoperiod Shortening On Terminal Bud Development And Quality In Pinus Banksiana Picea Mariana And Picea Glauca written by Sarah M. Miller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Black spruce categories.
Growth Nutrient Dynamics And Outplanting Performance Of Picea Mariana Mill B S P Seedlings In Response To Fertilization During The Hardening Period
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Author : Joseph R. Boivin
language : en
Publisher:
Release Date : 2001
Growth Nutrient Dynamics And Outplanting Performance Of Picea Mariana Mill B S P Seedlings In Response To Fertilization During The Hardening Period written by Joseph R. Boivin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Traditional nursery culture of containerized black spruce ('Picea mariana' [Mill.] B.S.P.) seedlings involves a late-season hardening period when irrigation and fertilization are withheld to stress seedlings and promote frost-hardiness. Nutrient uptake is limited without supplemental fertilization, hence growth during hardening results in severe dilution of internal nutrients. The main objective of this study was to promote nutrient uptake and avert N dilution by fertilizing seedlings during the hardening period. Growth continues during this time (15-weeks), but gradually declines at the end of the rotation. Hence, nutrient supplementation progressively diminished with time to match seedling growth rate. Fertilization initially increased N uptake and elevated N concentration above initial pre-hardening status, but uptake declined after 6 weeks when fertilization ceased, causing growth dilution and N concentration decline. Based on these findings, fertilization dosages were increased and delivery schedules were prolonged in a follow-up experiment. Prolonged high-dose regimes promoted N uptake and prevented dilution, as reflected by a sustained increase of N concentration with time. When transplanted for 12-weeks on Boreal forest soil substrates to test outplanting performance, seedlings that received prolonged high-dose fertilization during hardening resulted in 115% more biomass and 350% more N than conventionally reared seedlings. The results demonstrate that fertilization during the hardening period improves early outplanting performance of seedlings, and may benefit future reforestation in northern forests.
Effect Of Gamma Radiation Dose Rate And Total Dose On Stem Growth Of Pinus Banksiana Jack Pine Seedlings
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Author : B. D. Amiro
language : en
Publisher:
Release Date : 1986
Effect Of Gamma Radiation Dose Rate And Total Dose On Stem Growth Of Pinus Banksiana Jack Pine Seedlings written by B. D. Amiro and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Nutritional Preconditioning And Ectomycorrhizal Formation Of Picea Mariana Mill B S P Seedlings Microform
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Author : Ali M. Quoreshi
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2000
Nutritional Preconditioning And Ectomycorrhizal Formation Of Picea Mariana Mill B S P Seedlings Microform written by Ali M. Quoreshi and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.