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Polar auxin transport (PAT) is a process that controls all stages of plant growth and development . Knowing responsible for this process mechanisms thus became one of the main goals of modern science . With the latest research using molecular biology techniques were able to confirm wagered decades earlier hypothesis chemioosmotyczną . According to the PAT is achieved by the presence in the cytoplasmic membrane of specialized carriers entering (AUX) and leaving (PIN) from the cell auxin . Are currently known families of genes encoding said carriers . It was also found that the media flowing auxin is a protein complex and identified , at least partially , its putative components , as well as factors that affect the location of that media in the cell membrane . However, they failed to thoroughly explain any of the processes controlled by auxin . Whereas the discoveries were made that require verification of current perspective on the PAT . One of them is that known bazypetalny PAT is not the only way to long-distance auxin transport through the parenchyma or cambium ksylemowy pędowych part of the root , since a similar transport requires the presence of auxin carriers entering the cells are also found in the tissue floemowej . It is believed , therefore, that in the plant there may be multiple auxin transport paths , each of which may be associated with the control of another process. Another very important discovery has become a statement that the media flowing auxin can change their position in the cell membrane . Auxin transport direction could therefore be changed , in theory any other , depending on where in the membrane at the time carriers are located . This gives a clue to look for explanations of contradictions between the known bazypetalnym direction of PAT in tissues pędowych and akropetalnym orientation controlled by auxin processes such as the formation of primordial organs or tissue differentiation waskularnych .

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The Editorial Board
Andrzej Łukaszyk - przewodniczący, Zofia Bielańska-Osuchowska, Szczepan Biliński, Mieczysław Chorąży, Aleksander Koj, Włodzimierz Korochoda, Leszek Kuźnicki, Aleksandra Stojałowska, Lech Wojtczak

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