The degeneration of the stomium and septum cells is part of a developmentally timed cell-death program. Expansion of the endothecial layer and subsequent drying are also required for dehiscence. The endothecium tissue is responsible for the tensions that lead to splitting of the anther.
The endothecium is responsible for anther dehiscence to disperse pollen when they are mature (van der Linde and Walbot, 2019). The middle layer is located between the tapetum and endothecium.
The dehiscence of anther leads to the release of pollen grains. The anther ruptures at a specific site. If this site is on the outer side it is called extrorse dehiscence, if it is on the inner side it is introrse dehiscence and if it is towards other anthers it is called latrorse dehiscence.
Anther dehiscence refers to the opening of the anther in releasing pollen grains. Anther dehiscence type (Figure 9.27) is the physical mechanism of anther dehiscence. The most common, and ancestral, anther dehiscence type is longitudinal, dehiscing along a suture parallel to the long axis of the thecae.
Thus, the correct answer is option (A) Tapetum helps in the dehiscence of anther. Note: Endothecium is the layer of the anther wall that aids in anther dehiscence.
Even minor wound disruption needs to be treated right away to keep it from getting worse. An open wound is easily infected, and infection can lead to further separation. Complete wound dehiscence is a medical emergency, as it can lead to evisceration, where internal organs protrude through the wound.
The patient should be advised the wound will heal by secondary intention as a result of the dehiscence and that this can take several weeks.
Expansion of the endothecial layer and subsequent drying are also required for dehiscence. The endothecium tissue is responsible for the tensions that lead to splitting of the anther. This tissue is usually one to several layers thick, with cells walls of uneven thickness due to uneven lignification.
What Are Risk Factors for Dehiscence? A variety of underlying health conditions can increase a patient's risk for developing dehiscence after surgery. Such conditions include the patient being overweight or obese, hypertension, anemia, and hypoproteinemia.
Answer:The most commonly type of dehiscence pattern in another is the pollen grains is commonly released from the anther through a longitudinal slitlike opening in the anther wall but other method also occur .
The splitting of the plant structures in order to release its contents is called dehiscence. It is most commonly seen in anther to release pollens. The point where the anther breaks is called the line of dehiscence.
Dehiscence is a partial or total separation of previously approximated wound edges, due to a failure of proper wound healing. This scenario typically occurs 5 to 8 days following surgery when healing is still in the early stages.
Wound dehiscence typically occurs a few days after surgery, when healing is still in the early stages. It can be either partial, where the wound pulls apart in small areas, or complete, where the entire wound reopens. Separation of the wound can lead to severe complications, such as infection or evisceration.
Dehiscence is the process of pollen release from mature anthers. During dehiscence anther undergoes dehydration, pollen loses water and the strip between pollen sacs disintegrate resulting in the release of pollen grains.
B. Endothecium layer helps in dehiscence of anther. Which of the following layer helps in dehiscence of anther due to its hygroscopic nature?
Wound dehiscence is estimated to occur in 0.5–3.4% of abdominopelvic surgeries, and carries a mortality of up to 40%.
Wound dehiscence is when part or all of a wound comes apart. The wound may come apart if it does not heal completely, or it may heal and then open again. A surgical wound is an example of a wound can that develop dehiscence. Wound dehiscence can become life-threatening.
Risk factors for dehiscence and evisceration include age, diabetes, obesity, malnutrition, corticosteroid therapy, and sepsis. Wound infection is directly associated with over 50% of eviscerations [1]. Surgical technique can contribute to wound dehiscence.
Fenestration was considered as a local bone defect or as bone exposure of overlying alveolar bone on the root surface with the intact marginal bone. When the bone defect spread to the marginal bone, this was considered to be dehiscence.
The three principal types of dehiscent fruits are follicles, legumes, and capsules.
Anther dehiscence is an important process in mature stamens. In this process, lignin accumulation in the endothecium of anthers enables secondary wall thickening. Subsequently, septum and stomium lysis completes dehiscence1–6.
A dehisced wound can appear fully open – the tissue underneath is visible – or it can be partial, where just the top portion of the skin has torn open. The wound could be red around the wound margins, have drainage, or it could be bleeding or seeping, where only a thin trickle of blood is coming out.
Abdominal wound dehiscence (burst abdomen, fascial dehiscence) is a severe postoperative complication, with mortality rates reported as high as 45% [1–3]. The incidence, as described in the literature, ranges from 0.4% to 3.5% [4–17]. Abdominal wound dehiscence can result in evisceration, requiring immediate treatment.
Dehiscence is secondary to technical failure of sutures, shear forces from tension, or fascial necrosis from infection and/or ischemia (2). Evisceration is the uncontrolled exteriorization of intraabdominal contents through the dehisced surgical wound outside of the abdominal cavity.