首页|Thermal and photoperiodic requirements of the seedling stage of three tropical forest species

Thermal and photoperiodic requirements of the seedling stage of three tropical forest species

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Air temperature and photoperiod play an important role in the seedling development for tropical for-est species.Both variables are sensitive to climate,and so evaluating thermal and photoperiodic effects on seedling development is fundamental,especially for climate change studies.Methods to quantify thermal time and the energy required for plants to reach a development stage include air temperature and cardinal temperatures.The photoperiod will also affect physiological reactions of a plant and thus its development.Here we evaluated the six thermal time methods widely used to compute thermal requirement,and identified the influence of the photoperiod from the 2015 and 2016 growing seasons and 12 sowing dates in Itajubá,Minas Gerais state,Brazil,on seedling development of three native tropical forest species Psidium guajava L.(Myrtaceae),Citharexylum myrianthum Cham.(Verbenaceae),and Bixa orellana L.(Bixaceae).The method used to quantify thermal time influenced the analytical results of seedling develop-ment;the one that considered three cardinal temperatures and compared them with the mean air temperature(Method 5)performed better in computing thermal requirements.The influence of photoperiod on seedling development was inconclusive for the three species,but all three developed better in mild temperatures(between 13.3℃and 26.9℃)with a photoperiod shorter than 13 h.

PhyllochronThermal timeDay lengthSeedling stagePhenology

Fabrina Bolzan Martins、Mábele de Cássia Ferreira、Flávia Fernanda Azevedo Fagundes、Gabriel Wilson Lorena Florêncio

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Natural Resource Institute,Federal University of Itajubá,Itajubá,Minas Gerais 37500-903,Brazil

Minas Gerais Research Support FoundationMinas Gerais Research Support FoundationMinas Gerais Research Support FoundationCoordination for the Improvement of Higher Education PersonnelCoordination for the Improvement of Higher Education PersonnelFAPEMIGNational Council for Scientific and Technological DevelopmentNational Council for Scientific and Technological Development

FAPEMIGAPQ-01392-13APQ 01258-1788887.613734/2021-001827878process number ID14029CNPqprocess number 306845/2021-0

2023

林业研究(英文版)
东北林业大学,中国生态学学会

林业研究(英文版)

CSTPCDCSCD北大核心EI
影响因子：0.365
ISSN：1007-662X
年,卷(期)：2023.34(1)
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