Results 31 to 40 of about 309,576 (290)

Relationship between the timing of vessel formation and leaf phenology in ten ring-porous and diffuse-porous deciduous tree species [PDF]

, 2013
The goal of this study is to clarify how different aspects of plant function are coordinated developmentally for species of ring-porous versus diffuse-porous deciduous trees, comparing the timing of leaf phenology and vessel formation in twigs and stems ...
Nobuchi, Tadashi, Okada, Naoki, Takahashi, Sayaka   +2 more
core   +1 more source

Emissão e expansão foliar em três genótipos de tomateiro (Lycopersicon esculentum Mill.) Leaf emergence and expansion in three tomato (Lycopersicon esculentum Mill.) genotypes

Ciência Rural, 2007
O objetivo deste trabalho foi estimar o filocrono na haste principal e em hastes laterais de primeira ordem e estimar a área foliar a partir do número de folhas em três genótipos de tomateiro cultivados em estufa plástica. Um experimento foi conduzido em
Carina Rejane Pivetta, Ivonete Fatima Tazzo, Guilherme Fabiano Maass, Nereu Augusto Streck, Arno Bernardo Heldwein   +4 more
doaj   +1 more source

Impact of elevated temperature scenarios on potato leaf development Impacto de cenários de aumento de temperatura no desenvolvimento foliar da batata

Engenharia Agrícola, 2012
The objective of this study was to simulate the impact of elevated temperature scenarios on leaf development of potato in Santa Maria, RS, Brazil. Leaf appearance was estimated using a multiplicative model that has a non-linear temperature response ...
Nereu A. Streck, Lilian O. Uhlmann, Alencar J. Zanon, Dilson A. Bisognin   +3 more
doaj   +1 more source

Métodos de soma térmica e datas de semeadura na determinação de filocrono de cultivares de trigo Thermal time methods and sowing dates in phyllochron determination in wheat cultivars

Pesquisa Agropecuária Brasileira, 2009
O objetivo deste trabalho foi avaliar o efeito dos métodos de cálculo de graus-dia e de datas de semeadura na determinação do filocrono de cultivares de trigo (Triticum aestivum).
Hamilton Telles Rosa, Lidiane Cristine Walter, Nereu Augusto Streck, Cleber Maus Alberto   +3 more
doaj   +1 more source

Sanitizing the fortress: protection of ant brood and nest material by worker antibiotics [PDF]

, 2013
Social groups are at particular risk for parasite infection, which is heightened in eusocial insects by the low genetic diversity of individuals within a colony. To combat this, adult ants have evolved a suite of defenses to protect each other, including
Graystock, P, Hughes, W O H, Lopes, J F S, Shaw, C, Tranter, C   +4 more
core   +1 more source

A successive time-to-event model of phyllochron dynamics for hypothesis testing: application to the analysis of genetic and environmental effects in maize

Plant Methods, 2023
Background The time between the appearance of successive leaves, or phyllochron, characterizes the vegetative development of annual plants. Hypothesis testing models, which allow the comparison of phyllochrons between genetic groups and/or environmental ...
Sandra Plancade, Elodie Marchadier, Sylvie Huet, Adrienne Ressayre, Camille Noûs, Christine Dillmann   +5 more
doaj   +1 more source

Real-time, long-term hand tracking with unsupervised initialization [PDF]

, 2013
This paper proposes a complete tracking system that is capable of long-term, real-time hand tracking with unsupervised initialization and error recovery. Initialization is steered by a three-stage hand detector, combining spatial and temporal information.
Ledda, Alessandro, Philips, Wilfried, Spruyt, Vincent   +2 more
core   +2 more sources

CO2Effects on Phasic Development, Leaf Number and Rate of Leaf Appearance in Wheat [PDF]

Annals of Botany, 1997
It has been predicted that the concentration of CO2in the air could double during the 21st century. Though it is recognized that CO2-doubling could increase yield through its effects on plant photosynthesis and stomatal behaviour, it is unclear whether CO2-doubling will change phasic development in wheat.
openaire   +1 more source

Emissão de folhas e início de acumulação de amido em raízes de uma variedade de mandioca em função da época de plantio Leaf emergence and beginning of starch accumulation in roots of a cassava variety as a function of planting date

Ciência Rural, 2007
O número de folhas acumulado (NF) na haste principal está associado com o aparecimento de vários estádios de desenvolvimento da cultura da mandioca. O início de acumulação de amido (IAA) nas raízes tuberosas da mandioca marca o início da translocação dos
Alfredo Schons, Nereu Augusto Streck, Bruno Kraulich, Diego Garrido Pinheiro, Alencar Junior Zanon   +4 more
doaj   +1 more source

Leaf appearance of annual clovers responds to photoperiod at emergence [PDF]

European Journal of Agronomy, 2016
Abstract Leaf appearance rate and time to canopy expansion of four annual clover species (arrowleaf, balansa, gland and Persian) were quantified in field and controlled environment studies. Crops sown in autumn, which experienced shortening daylengths at emergence, had a slower rate of leaf production and consequently took a longer time to initiate ...
H., Nori, D.J., Moot, A.D., Black
openaire   +2 more sources