Регуляция роста и пространственной ориентации боковых корней Arabidopsis thaliana L

Боковые корни играют существенную роль в формировании разветвленной корневой сети, а значит определяют потенциал растения в поиске и потреблении ресурсов, механическом креплении в почве. В отличие от инициации, развитие боковых корней после их выхода из главного корня стало объектом рассмотрения ученых сравнительно недавно. На основании длины, угла по отношению к вектору гравитации и количества клеток в колумелле выделяют 6 стадий развития бокового корня. Как и в случае с главным корнем, ведущую роль в гомеостазе боковых корней несут растительные гормоны - ауксин и цитокинин. Но на отдельных стадиях развития отклики боковых корней на действие ауксина, цитокинина и абсцизовой кислоты значительно отличаются от известных процессов в главном корне, и оказывают существенное влияние на архитектуру корневой системы. Различия в организации эндогенной регуляции главного и боковых корней наглядно проявляются в их индивидуальной реакции на доступность отдельных элементов минерального питания и засоление. В данном обзоре собраны актуальные данные касательно скорости роста, ориентации и внутренних механизмов регуляции роста и развития боковых корней модельного растения Arabidopsis thaliana.

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