Open style - style of stigma interaction, Biology

Open Style - Style of Stigma Interaction

Aegle, Fritillaria, Lilium spp. have variable number of stylar canals depending on the number of carpels. The epidermal cells of stylar canal divide actively and become papillate in acropetal succession. In Lilium each cell contain 1-5 nuclei which later fuse. The stylar canal thus becomes lined with highly glandular and secretory cells which are dome-shaped with a thick outer tangential wall (canal cells). The wall towards the canal is smooth but is highly convoluted towards the interior of the cells. In Citrus the inner tangential wall of canal cells is thick and made up of fibrillar homogeneous and granular nonhomogeneous material. The canal cells have a large nucleus and often become multinucleate.

Cytoplasm is rid in organelles such as mitochondria, dictyosomes, free ribosomes or polysomes, smooth and rough ER and occasional amyloplasts. It is supposed that a main portion of the secretion product is transported to the canal cells from the neighboring parenchyma cells through the numerous plasmodesmatal connections. The golgi apparatus of canal cells of Lilium regale and Lilium devidii secrete a non- cellulosic and amorphous polysaccharide containing mucilage during the bud stage. This is easily transported to the outer walls of canal cells. In L. longiflorum, the secretion products of the canal cells are retained with the help 'of a thin and continuous layer of cuticle until after pollination. The stigmatic papillae of Lilium lack the characteristic secretory zone seen in canal cells and the stigmatic exudate is known to appear before pollination. The stigmatic exudate, may, therefore be a secretion product of the canal cells transported through the intercellular spaces. The stylar exudate is produced in two phases in Lycopersicon; the first contains carbohydrate and the second proteins.

Posted Date: 1/23/2013 3:22:00 AM | Location : United States







Related Discussions:- Open style - style of stigma interaction, Assignment Help, Ask Question on Open style - style of stigma interaction, Get Answer, Expert's Help, Open style - style of stigma interaction Discussions

Write discussion on Open style - style of stigma interaction
Your posts are moderated
Related Questions
Which of the following serves as an actuating signal, or as part of an actuating signal, in a system with feedback? (Either positive feedback or negative feedback) A. Blood pla

Define Physiologic Functions of Iodine? Thyroid hormone performs multiple functions as regulator of cell activity and growth. The hormone has crucial metabolic roles in the foe

How to reduce the stresses on the implant i) There is need to reduce the stresses on the implant - ii) Frequent recall for maintenance or hygiene appointments. iii) Gingi

Q. Which is the kind of nitrogen waste eliminated by beings of the class Reptilia? These beings excrete mainly uric acid this substance is less toxic than ammonia and it can be

Anabolism and Lipogenesis : Beside  the glucose  stored  as glycogen  some  glucose of  blood  isanabolized in everybody cell, into  structural  polysaccharides for  growth. Repair

Why did it take 150 years for the cell theory to be developed after microscopes were invented? Information about cells could not be understood and organized into a central theo

Q. Describe Cluster analysis? After making a similarity table, it is then rearranged so that OTU's whose members have the highest mutual similarity are brought together. This c

CHEMICA L COMPOSITION OF CHROMATIN Chromatin threads composed of DNA (31 %), RNA (2-5%) and proteins (Histon-36%, Non histon 28%). Histone and protamines are basic prote

Assume that you have 1 mL of a solution amylase (an enzyme) at a concentration of 15 mg protein/mL. Calculate the volume of diluting buffer that you would have to add to 1.0 mL of

Q. Can you explain Shellfish Poisoning? Shellfish like oysters, mussels and clams are generally bred in the sewage polluted beds or brackish water. The shellfish poisoni