Given figures show the pollen-stigma interaction, where pollen wall proteins are released onto the pellicle of stigmatic papillae, where recongnition reaction occurs.

Which of the following statements drawn from given figures is incorrect ?

Answer

C

Explanation

Most studies on the physiology and biochemistry in intra-and interspecific incompatibility have highlighted the importance of the pollen wall and its protein contents in the pollen-stigma interaction. The most distinct response of the stigma to an incompatibel pollen is the development of callose plug between the plasma membrane and pectocelulosic layer of the stigmatic papillae, just below the point of contact with the pollen a callose plug also appeats at the tip of the pollen tube. With the appearance of the callose-plug the growth of the pollen tube ceases. the deposition of callose in the stigmatic cells can be employed as a reliable bioassay to detect incompatible pollen particularly where the rejection occurs on the stigma. This biossay has served as a useful aid in providing direct evidence for the involvement of exine-borne proteins in incompatibility reaction.