Response of Stevia rebaudiana Bertoni root system to waterlogging and terminal drought stress
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2015, Vol 6, Issue 3
Abstract
This research studied the effect of waterlogging level and duration, nitrogen fertilizer and terminal drought stress on root and shoot growth of Stevia. Treatments included four waterlogging levels; (0, -5, -10 cm from soil surface and with normal irrigation as control), in periods of 2 and 4 days of waterlogging, two levels of nitrogen (6‰ and 0) from source of urea and two levels of terminal drought stress. Results showed measured root and shoot traits include root dry weight, root length, root area, root volume, root length density, root surface area density, dry root mass density, root diameter, leaf area, plant height, number of SPAD, number of lateral shoot, number of leaves were significantly different among treatments. Root dry weight, root length and root volume in -10 waterlogging level treatment( 16.24 g, 24.8 cm and 27.7 ml, respectively) and in fertilizer treatment (17.9 g, 25.5 cm and 22.1 ml, respectively) shown the least decrease. Moreover, interaction between drought stress treatment and nitrogen fertilizer for root dry weight and root length (18.4 g and 26.5 cm, respectively)and in shoot traits, number of leaves, leaf area and plant height (237, 64.07 cm2 and 87 cm) showed the minimum difference with control treatments. Generally, the results of this experiment showed that increase of waterlogging either level or duration decrease the amount of root and shoot characteristics. Nitrogen fertilizer resulted in higher root and shoot traits in applying treatment. By contrast, terminal drought stress led to decrease in all root and shoot traits.
Authors and Affiliations
Reyhaneh Pordel, Masoud Esfahani, Mohammad Kafi, Ahmad Nezami
Use of carbon in increasing the quality of drinking water - Case study: the wells of Savejbolagh villages
The drinking water of Jangale Dar village, environ of Savejbolagh city of Alborz province, is provided from a well located at this village. The water of this well is appropriate and within standard range in terms of qua...
Sugar and anthocyanin characterization of four Iranian pomegranate (Punica granatum L.) varieties using HPLC System
Among all types of fruit, pomegranate has been known as an excellent fruit due to its high valued nutraceutical components; i.e. anthocyanins, phenolic compounds and organic acids. This research aimed to measure anthoc...
The Study and Analysis of Government’s Role in Rapid Growth of Urbanization (Case Study, Ardabil City)
Migratory patterns and population growth in urban areas have been taken for granted in developing countries. In such a condition cities have undergone changes in two directions. On the one hand capital flow led to urban...
Using selected biophysical parameters and remote sensing in tree species diversity and size monitoring in natural woodlands under non-rainfall limitation conditions
This study assessed the feasibility of using selected biophysical parameters (Slope, altitude, aspect, soil pH, phosphorous, nitrogen and carbon) and remote sensing to monitor tree species diversity and size in an examp...
Antagonist effect of volatile organic compounds produced by Debaryomyces hansenii on Colletotrichum gloeosporoides as anthracnose reason of tropical apples.
The usage antagonist yeast for biological control had emerged as one of the most promising alternatives in pre and postharvest protection of apples in Indonesia. The aim of the research was to identify volatile organic c...