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  • ISSN: 2333-6668
    Volume 5, Issue 1
    Short Communication
    Vijayakanth P and Sahaya Sathish S*
    The present investigation is on the chromosome count of Pyrrosia porosa (C. Presl) Hovenkamp, a fern of Kolli Hills, Eastern Ghats, South India. The young sori were collected from Kuzhivalavu of Kolli Hills. The sori showed 37 bivalents at first meiosis of spore mother cells. Diploid cytotype of P. porosa has been reported from Eastern India and Eastern Himalaya so far. This is the first report of the diploid cytotype from South India.
    Mini Review
    Chuan-Ming Yeh, Masaru Ohme-Takagi, and Wen-Chieh Tsai*
    Phosphorus (P) is a macronutrient essential for plant growth and development. However, the solubility of inorganic phosphate (Pi), the available form for plant uptake, in soils is low. Plants have evolved various adaptive mechanisms to cope with Pi deficiency stress. Change of root system architecture (RSA) is a well-known adaption in response to Pi deficiency for exploration of available Pi at top soil layers. Although aux in has long been considered to be the key player controlling RSA under Pi deficiency, increasing evidences indicate ethylene also plays an important role in regulating these processes. In addition to RSA, it has been reported in recent years that ethylene is involved in the regulation of other Pi starvation responses (PSRs) including Pi transporter gene expression, acid phosphatase activity and anthocyan in accumulation. It reveals that ethylene may regulate a complex network for plant adaptive responses to Pi deficiency. Here, we review the current knowledge on the involvement of ethylene in plant PSRs.
    Review Article
    Bula Kere Oda and Baressa Anbessa Erena*
    This review work tries to address on ethno botanical knowledge of Aloe plants in Ethiopia. There are 46 species of Aloe in Ethiopia in which about 66% of these Aloe species are endemic to the country. They are distributed in all floristic regions. Aloes are very important source of traditional medicine in Ethiopian communities to treat different ailments. In addition Aloes are used in soap production, jute sacks production, anti-microbial activities in cotton fabric, as thickening agent, degraded land rehabilitation and source of food for animals. Although there have been some attempts to conduct researches on Ethiopian Aloe species, the available information especially on commercial use, industrial use, propagation, germination and farming are insignificant and overlooked. As their distribution indicate Aloes are important component of Ethiopian dry-land ecosystem including pastoralist and agro-pastoralist area in which the amount of rain is low. In this area introducing Aloe farm system could be better alternative of poverty reduction and income generation. The presence of anthropogenic and environmental factors such as agricultural expansion into marginal lands, overgrazing, habitat destruction and restricted distribution may affect Aloe plants that could play great role in economic development for present and future generations of the country. As a result Aloe species need urgent conservation attention, effective documentation and further research.
    Research Article
    Suman Kumar Ray and Sarmistha Sen Raychaudhuri*
    Momordica charantia L. (Family: Cucurbitaceae) is a well known medicinal plant and widely distributed and cultivated in many parts of the world. Momordica is a powerful, nutrient-dense plant, composed of a complex array of beneficial compounds. Seeds were collected from arsenic free area and were propagated in tissue culture media in presence of different concentration of sodium arsenate along with control one. The aim of the present study was to investigate some biochemical parameters of extracts of Momordica under the influence of arsenic. Chlorophyll and carotenoid content was affected by arsenic maximum (150 µM) in Momordica. Arsenic induced alteration in free radical scavenging activity, total polyphenolic content, lipid peroxidation, antioxidant activity and flavonoid content were determined in this study.
    Valentina Longo*, Rana Valizadeh Kamran*, Anna Michaletti, Mahmoud Toorchi, Lello Zolla and Sara Rinalducci
    Cold is one of the most significant abiotic stresses that restrict crop growth and productivity worldwide. In order to investigate how spring barley (Aths cultivar) adapts to short-term cold stress, the present study attempted to explore proteomic, physiological, and biochemical changes that occur in leaves. Barley seedlings were exposed to low temperature (4°C) for 48 hours, and third leaves were harvested and compared with plants grown in normal conditions (25°C). In cold-stressed plants, results indicated a significant increase in hydrogen peroxide content, associated with a highly significant rise of lipid peroxidation (as demonstrated by MDA measurements) and catalase activity; the latter represents one of the oxidative stress resistance strategies adopted to promote cell survival. Cold stress also caused a significant reduction in chlorophyll b (chlb) content with a parallel increase in the chla/chlb ratio, which is probably related to defense mechanisms against cold-induced production of reactive oxygen species. On the contrary, other physiological and biochemical traits [namely, the membrane stability index (MSI), peroxidase activity, electron leakage, carotenoid and chla content] showed no statistically significant differences. The proteomic analysis revealed fifteen statistically significant cold-modulated spots, seven of which were successfully identified by LC-MS/MS. These responsive proteins are related to the Calvin cycle, photosynthetic electron transport, light reactions, and signal transduction. An increase in abundance of proteins involved in the regulation of the chloroplast system probably reflects plant acclimation to cold, thus confirming that cold stress severely affects photosynthesis in spring barley.
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