نتایج جستجو برای: Senescence
تعداد نتایج: 19206 فیلتر نتایج به سال:
Leaf senescence constitutes the last stage of leaf development in plants and proceeds through a highly regulated program in order to redistribution of micro- and macro-nutrients from the senescing leaves to the developing/growing plant organs. Initiation and progression of leaf senescence is accompanied by massive sequential alterations at various levels of leaf biology including leaf morpholog...
Background and purpose: Different sources have provided various descriptions on the onset of senescence and its associated factors. Any person may become senile at a different age. The objective of the present study was to explore the feelings related to the onset of aging and factors influencing it based on old women’s experience. Materials and methods: This study used a qualitative approach ...
In order to find out the importance of flag leaf in Hordeum vulgare L. cv. Hordea in some physiologic traits and photosynthetic and leaf senescence-related gene expression, a field experiment was carried out in Warwick University Research Farm, UK, in 2003. For more accuracy and statistical comparison of the calculated means, the experiment was carried out in 4 replicates. Random leaf samples w...
Background and purpose: Induction of cellular senescence is indicative of new strategy to prevent abnormal proliferation of cancer cells. Doxorubicin (DOX) is gaining attention for its neoplasia suppressive and inhibitory properties, but its clinical utility is limited due to irreversible effects on non-target cells/tissues. In this way, nanoliposomal structures were developed in drug delivery ...
Objective(s): In this paper, we discussed natural agents with protective effects against stem cell senescence. Different complications have been observed due to stem cell senescence and the most important of them is “Aging”. Senescent cells have not normal function and their secretary inflammatory factors induce chronic inflammation in body which causes different patho...
Objective(s): Lipocalin2 (Lcn2) gene is highly expressed in response to various types of cellular stresses. The precise role of Lcn2 has not been fully understood yet. However, it plays a key role in controlling vital cellular processes such as proliferation, apoptosis and metabolism. Recently it was shown that Lcn2 decreases senescence and increases proliferation of mesenchymal stem cells (MSC...
Recent studies showed that salicylic acid (SA) and nitric oxide (NO) functions as an essential endogenous plant signal molecule. In this study, the regulatory role of NO and SA during the flower senescence of Polianthes tuberosa L. was surveyed. Exogenous application of the NO donor sodium nitroprusside (SNP) and SA could delay flower senescence processes. The flowers were cut and kept in a vas...
nanosilver of nanometer-sized silver (ag+) particles (2-5 nm diam) are used in various applications as an anti-microbial. boric acid (h3bo3) is water soluble (ph=7). boric acid is ethylene synthese inhibitor and reduce ethylene production through reducing the acc synthase and acc oxidase delays senescence of flower. in this study of different concentrations of boric acid and nano-silver was eva...
objective(s): lipocalin2 (lcn2) gene is highly expressed in response to various types of cellular stresses. the precise role of lcn2 has not been fully understood yet. however, it plays a key role in controlling vital cellular processes such as proliferation, apoptosis and metabolism. recently it was shown that lcn2 decreases senescence and increases proliferation of mesenchymal stem cells (msc...
in this study, effect of different concentration of ascorbic acid (asa, 0, 2, 4 and 6 mm) on delaying senescence in cut rose flowers cv. royall class was investigated based on factorial design. the results showed that the greatest delay in senescence was obtained with 4 mm asa as compared to control (distilled water). therefore, fresh weight and diameter of flowers treated with 4 mm asa was mor...
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