Leaf Senescence is one of the most significant changes during autumn. It describes a natural event that occurs during this season. Many people often recognize the autumn color of leaves. This event happens because of programmed cell death that in the plant. Needless to say, plants exist because of the co-existence of cells. Therefore,……….
Apoptotic Changes That Occur During Leaf Senescence.
Leaf senescence is usually signaled by a series of transcription factors. The NAC transcription factors take part in the sequencing pattern. The N-terminal factors have DNA binding domains that regulate the process of senescence. Moreover, the WRKY has a finger-like motif that ensures DNA is bound. These transcription………..
Leaf senescence involves the breakdown of macromolecules including starch, nucleic acid and cellulose. It is the reason why many plants wither during this period. There are internal and external factors………..
There are various factors that take part in the regulation of leaf senescence. Chromatin-mediated regulation involves the use of the ORE7 and HDA6 genes. They ensure that this process takes place in a controlled manner. Post-transcriptional regulation involves the use the miR164 gene………..
Cytochrome c is bound to the inner membrane by cardiolipin which is a charged lipid. There are weak covalent bonds that promote the formation of this bond. During apoptosis, research shows that there is subsequent breakage of this weak attraction……….
They lead to an instant response in the cristae. The attenuation of the bond between cardiolipin and cytochrome c leads to the progressive release of cytochrome c. Pores in the membrane promote the efflux into the cytoplasm………….
The influx happens because of the dysfunction of the sodium-potassium pump due to the presence of depleted energy. Another morphological change takes place in the cristae. Scientists refer to this phenomenon as………..
Many experts have extensively studied apoptosis. Their results show that chloroplasts have a minor role in the apoptotic process. In fact, previous research showed that the chloroplasts do not take part in apoptosis……..
The Results and Discussion of the Report
Results show that there are many morphological changes that occur during leaf senescence. In fact, these changes are the basis for the assays that detect apoptosis. Scientists have developed various tests that indicate presence of apoptosis in plant cells. It is a crucial aspect in the study of apoptosis. In fact, understanding…………..
Eosinophilia is a result of the loss of chromatin. Chromatin is always basophilic in nature. It distinctively attracts hematoxylin. It causes the intense purple staining of the nucleus. The progressive disintegration………..
Scientists can view the condensation of chromatin during pyknosis. The presence of apoptotic sequences in the nucleus usually precipitates this phenomenon. Additionally, the successive fragmentation of the nucleus is visible under the electron microscope. Many scholars believe that the nucleus regulates the rate……….
Gel electrophoresis uses polyethylene glycol to filter out the DNA from apoptotic cells. Subsequently, the DNA is filled with fluorescent dyes. The presence of fragmented DNA evidences the presence of apoptotic…………
Senescence is vital in the functioning and survival of deciduous trees. The change in color always leads to loss of chlorophyll and other phototropic elements. Besides, the leaves also fold and decrease the surface……
The electron transfer systems found in chloroplast probably induce the release of cytochrome c from the mitochondria. It results in increased apoptosis. Studies show that there is depletion of glycogen granules…….
Conclusions and Future Perspectives
Indeed, this research has unearthed a lot of knowledge. Senescence aids in the preservation of energy reserves in plants. It always takes place during the autumn season. It mostly takes place in deciduous trees…………
Senescence has divided plants into two categories. These categories show the period that an individual plant takes for complete senescence to take place. They include the annual and perennial plants. Annual plants require a year for the complete exchange of genes………..