Platt’s research strategy called ‘strong inference’ is often studied, but is difficult to apply. Here strong inference is applied in selecting differential equation models of sugar maple, Acer saccharum M., height growth. Two model groups proposed by Zeide (1993; Zeide, B. 1993. Analysis of growth equations. For. Sci. 39(3):594-616.) are supplemented with two additional groups, 1) size decline ...

Some plants can live for thousands of years, facing the problem of preventing accumulation of deleterious mutations. A recent study shows that massive tree stature requires surprisingly few stem cell divisions, and that the mutational load is not proportional to stature, but to branching order.

In forestry, it is still common to plant the seedlings of and cultivate Norway spruce (Picea abies L. Karst) at lower altitudes; however, climatic change that has been occurring increases evaporative demands in these areas. As a result, evidently suffers from drought, withers loses its power grow, thus, influencing stem thickness tree-height growth, as well biomass production. Therefore, growth...

The growth responses of Phaseolus vulgaris L., cv. "Red Kidney" plants to simazine at 5 x 10~M and 5 x 10^M, kinetin at 9 x 10~M and 9 x 10~M, and the presence or absence of Rhizobium phaseoli ATCC14482, in factorial combination, were measured. The plants were analyzed with respect to the lengths of the primary-through-quaternary leaves, stem height, fresh and dry weights, number of flowers, an...

abstract in order to study salt stress, calcium and potassium effects and type of application on sorghum plant, a field experiment was arranged in randomized complete block in split plot design at the research field of center of excellence for special crops, ferdowsi university of mashhad at 2008. experimental treatments were included two levels of salinity (5 and 10 ds.m-1) as main plots and f...

in order to finding cultivars with high yield and compatible with potato in the form of fall cultivation in jiroft area, an experiment in randomized complete block design with three replication, was done in jiroft agricultural research center in 2013. in this experiment height plant, no. stem, tuber diameter, tuber weight/plant, no. tuber and yield were examined. effect prevent freezing cropaid...

A Pinus pinaster Ait. progeny trial involving 46 open pollinated families was established at two locations in Portugal (Leiria and Escaroupim). Height, diameter, Pilodyn and stem characteristics (straightness, branch size and number of whorls) were assessed at age 5 and 12 and were used to estimate variance components, heritability, phenotypic and genetic correlations between traits. Estimates ...

In order to study the effect of silver nanoparticles and magnetic field on Raphanus sativus. experiments were carried out with four treatments in 10 days. Treatments were including (CON) control, (MF) magnetic field with B=1.8 mT for 1h per day in 10 days, (SNPs) silver nanoparticles (50 ppm), (MF+SNPs) magnetic field plus silver nanoparticles. Results showed that silver nanoparticles (SNPs) ha...

We used stem-analysis data from 60 to 100 years-old second-growth stands, and single-point observations in 260–460 years-old trees, to study and model height development of Nothofagus obliqua (“roble”). The data covers a much wider range of ages than previous work on this species. A stochastic differential equation approach facilitated the estimation and comparison of alternative model variants...

Extensins are hydroxyproline-rich glycoproteins which are abundant in the cell walls of higher plants and whose precise function has been the subject of much speculation. In order to investigate this, transgenic A. thaliana plants were generated containing the Arabidopsis Atext1 extensin coding sequence under the transcriptional control of the strong constitutive CaMV 35S promoter. Northern ana...