Tag: Chlorophyll

Impact of bio-fertilizers and different levels of lead on pigment content of wheat (Triticum aestivum L.) – JBES

Alireza Pazoki, Mohammad Nabi Ilkaee, Mahdi Davoodi Far, Farid Golzardi

Department of Agronomy and Plant Breeding, Yadegar-e-Imam Khomeini (RAH) Shahre-rey Branch, Islamic Azad University, Tehran, Iran

Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran

Department of Agronomy and Plant Breeding, Faculty of Agriculture, Roudehen Branch, Islamic Azad University, Roudehen, Iran

Young Researchers and Elite Club, Karaj Branch, Islamic Azad University, Karaj, Iran

Key words: Lead, Chlorophyll, Carotene, Lead, Wheat, Xantophyll.

Abstract

Among heavy metals, lead is a potential pollutant that readily accumulates in soils and sediments. Although lead is not an essential element for plants, it gets easily uptake, accumulated in different plants sections and had destructive effects on leaf pigments in photosynthetic reaction. Continue reading Impact of bio-fertilizers and different levels of lead on pigment content of wheat (Triticum aestivum L.) – JBES

Investigation morphological and physiological response of Thymus vulgaris L. to drought stress – JBES

Mansour Sarajuoghi, Bohloul Abbaszadeh, Mohammad Reza Ardakani

Department of Agronomy, Borujerd Branch, Islamic Azad University, Borujerd, Iran

Department of Agronomy, Karaj Branch, Islamic Azad University, Karaj, Iran

Key words: Thymus vulgaris, essential oil, thymol, chlorophyll, soluble sugars.

Abstract

This study was performed to evaluate the effect of drought stress on quality and quantity yield of Thymus vulgaris under field and laboratory condition in Karaj, Iran. The study was conducted as randomized complete block design with five treatments and three replications. Continue reading Investigation morphological and physiological response of Thymus vulgaris L. to drought stress – JBES

Genetic diversity and heritability of chlorophyll content and photosynthetic indexes among some Iranian wheat genotypes

M.Khodadadi, H. Dehghani, M.H. Fotokian, B. Rains

Plant Breeding and Biotechnology Department, Faculty of Agriculture, TarbiatModares University, Tehran, Iran

Agronomy and Plant Breeding Department, Faculty of Agriculture, Shahed University, Tehran, Iran

Department of Agronomy and Range Science, University of California, Davis, CA 95616, USA

Key words: Chlorophyll, clustering, diversity, photosynthesis indexes, wheat.

eatwell_wheatAbstract

Genetic diversity and heritability of Chlorophyll (Chl) content and some photosynthetic indexes were studied in thirty wheat genotypes through randomized complete block design with three replications at 2009. The maximum and minimum heritability were obtained for chlorophyll (0.75-0.89) and stomatal conductance (0.2), respectively. The least phenotypic and genotypic coefficients of variation were observed for CO2 levels in boundary layer. Phenotypic and genotypic correlation coefficients between Chl a, Chl b and total Chl were similar and between SPAD Chl and Chl b were significantly high. Chl b content and transpiration rate, stomatal conductance and H2O levels in boundary layer had positive and significant genotypic correlation. CO2 levels in boundary layer and stomatal conductance were significantly and linearly associated with photosynthesis rate. 78.62% of data variation was explained by two factors. Genotypes in first group showed appropriate photosynthetic characters for resistance to drought and heat. Genotypes in third group have high chlorophyll content and photosynthesis rate. Maximum (103.19) and minimum (0.98) genetic distance was found between Moghan 3 and Kavir and between star and Tajan, respectively.

Get the original articles in Source: Volume 4, Number 1, January 2014 – JBES

Published By: Journal of Biodiversity and Environmental Sciences (JBES)

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Effects of fresh leaf materials of Sesbania sesban (L.) Merrill on the growth and photosynthetic pigments of nightshade (Solanum nigrum L. var. popolo)

Musyimi D. Mutisya, Okello S. Victor, Sikuku P. Anyango and Mutevu J. Masila

Maseno University, Department of Botany, School of Biological and Physical Sciences, P.O BOX 333, Maseno, Kenya

Key words: Carotenoids, cheaper nutrients, chlorophyll, green manure, Sesbania.

Abstract

4704Solanum nigrum L. is one of the African leafy vegetable consumed in Kenya. High cost of inorganic fertilizers has made it inaccessible by smallholder farmers leading to low yields. A study was conducted at Maseno University, Kenya to investigate the effects of Sesbania sesban fresh leaf materials on the growth of Solanum nigrum L. The study was conducted under greenhouse conditions using 3litre pots. Each pot was filled with 2kg of top soil and five treatments of fresh leaf materials of S. sesban incorporated at the rates of 0g (control), 15g, 30g, 45g and 60g. Ten seeds of S. nigrum L were planted in each pot and were watered daily until they germinated after which they were thinned to five seedlings per pot. The experiment was laid out in a completely randomized design (CRD) with 5 replications. Data on stem length, number of leaves per plant, leaf length, leaf breath were collected each week from the fifteen day after germination. Fresh and dry weights of the stems and roots, Leaf chlorophyll and carotenoids contents were determined at the end of the experiment. The data collected was subjected to ANOVA and means separated and compared using the least significant difference (LSD) at P = 0.05, using SAS statistical package. The study showed that there was a significant effect of application of fresh leaf material of S. sesban on the growth of S. nigrum plants, variety: popolo. Treatment consisting of 45g of fresh leaf material of S. sesban had the highest number of leaves, leaf area, plant height, fresh weight of the shoots and roots, and dry weights of shoots and roots. Chlorophyll a (chl a) and chlorophyll b (chl b) contents increased in all the treatments receiving fresh leaf materials of S. sesban. There were no significant differences in Chl a and chl b contents among the treatments receiving fresh leaf materials. Carotenoids contents of S. nigrum increased with increasing amounts of fresh leaf material of S. sesban. However, there was no significant difference in carotenoids contents between treatments. In conclusion fresh leaf material of sesbania promoted growth and increased photosynthetic pigments of S. nigrum, probably this was due to high amounts of nutrients supplied by S. sesban. The under exploited potential of S.sesban green manure can be harnessed in growing S. nigrum plants.

Source:

* Pdf: http://www.innspub.net/wp-content/uploads/2014/05/IJAAR-V4No5-p10-21.pdf

The effect of Salicylic acid on physiological characteristics of Lolium grass (Lolium perenne cv. “Numan”) under drought stress

Seyedeh mahsa Hosseini, Mohsen Kafi, Masoud Arghavani

Department of Horticulture (Ornamental Plants), Faculty of Agriculture, Science and Research Branch, Islamic Azad University, Iran

Department of Horticultural Sciences, University of Tehran, Iran

Department of Horticultural Sciences, University of Zanjan, Iran

Key words: Field capacity, chlorophyll, electrolyte leakage, antioxidant enzyme activity, proline accumulation.

Abstract

fdggfSalicylic acid is involved in plant responses to abiotic stress such as drought, cold, heavy metal poisoning, heat and osmotic stress. This study carried out to investigate the effect of salicylic acid on physiological characteristics of Lolium grass (Lolium perenne cv. “Numan”) under drought stress. A factorial experiment in a completely randomized design with four replications was performed. The treatments consisted of three salicylic acid levels (0.0, 0.75, and 1.5 mm) and drought stress consisted three levels (50, 75, and 100 percent of field capacity). Salicylic acid Foliar application at 0.75 and 1.5 mm levels increased the content of chlorophyll a, b and reduced electrolyte leakage, proline accumulation and antioxidant enzyme activity, which suggests that salicylic acid, to reduce the negative impacts of drought stress.

Source:

* Pdf: http://www.innspub.net/wp-content/uploads/2015/07/IJAAR-V7No1-p7-14.pdf