dog rose (rosa canina) has been using as a rootstock for ornamental roses also it is one of the medicinal plants. it can be propagated under in vitro conditions. after removing chilling requirement of buds, axillary wood buds of dog rose were cut in three nodal positions (lower, middle and terminal) on the stem and then explants after decontamination, cultured on murashige and skoog medium (ms ...

a greengouse experiment was conducted to evaluation of salinity stress on growth parameters of two olive cultivars during 2013-2014 at agricultural and natural resources research center of tehran. in the experiment, effects of five levels of irrigation water salinity including 0, 4, 8, 12 and 16 ds.m-1 were evaluated on ʻzardʼ and ʻmissionʼ olive cultivars under soilless culture. data showed th...

Plants size, shape and adaptability are determined in large by their capacity to sustain, spur, redirect or arrest localized and whole-plant growth. We show that GA signaling and metabolism determines the level and extent of shoot and root growth. Increase of GA concentrations or signaling leads to increased shoot growth but suppresses root development. These GA-related responses are underpinne...

Hammada elegans is a widely distributed shrub in arid rangelands. It has a potential for reseeding. Identification of reliable and easy to measure growth attributes will help in monitoring seedling survival and establishment in reseeding projects. The aim of this study is to identify seedling growth attribute(s) that can be used to predict survival and establishment of H. elegans using simple c...

Effect of various concentrations of different sugars was investigated for induction of root and shoot from basmati rice. Explant, seeds (grains) were transferred in 1⁄2 MS basal media fortified with different concentrations of carbon source like sucrose, maltose and dextrose. In vitro regenerated rice plantlets were healthy and attained a length of 16.17cm at 0.25 % concentration within a week....

A procedure was developed for in vitro propagation of Curculigo latifolia through shoot tip culture. Direct regeneration and indirect scalp induction of Curculigo latifolia were obtained from shoot tip grown on MS medium supplemented with different concentrations and combinations of thidiazuron and indole-3-butyric acid. Maximum response for direct regeneration in terms of percentage of explant...

abstract growth retardants are new chemical organic compounds that increase period of flowering, leave chlorophyll, lateral shoot number, flower number and decrease vegetative growth. they also increase dry, cold and heat tolerance. paclobutrazol and cycocel are examples of these compounds. this study was conducted to evaluate the effect of paclobutrazol and cycocel on some quantitative and qua...

araucaria excelsa l. of araucariaceae family is a beautiful conifer which has a high economic importance in the flower industry. a factorial experiment based on randomized completely block design with two factors: 1. irrigation intervals in 2, 4 and 6 days (i1, i2 and i3) and 2. the growth bed in pots 3 l included m1 (100 % v/v cocopeat), m2 (100%  municipal waste compost), m3 (100 % vermicompo...

The extent of growth stimulation of C3 plants by elevated CO2 is modulated by environmental factors. Under optimized environmental conditions (high light, continuous water and nutrient supply, and others), we analysed the effect of an elevated CO2 atmosphere (700 ppm, EC) and the importance of root-bed size on the growth of tobacco. Biomass production was consistently higher under EC. However, ...