Changes in cell size and number and in rhizodermal development contribute to root tip swelling of Hyoscyamus albus roots subjected to iron deficiency

Plant Physiology and Biochemistry : PPB
Yuki Kawahara, Yoshie Kitamura

Abstract

Root tip swelling is a common phenomenon observed when plant roots are subjected to Fe deficiency. We analysed whether an increase in cell number or an enlargement of cell width was involved in this phenomenon. Root tips of Hyoscyamus albus cultured with or without Fe were stained with fluorescent SYTO14 and analysed by confocal laser-scanning microscopy. Time-course and position-based examination revealed that the inhibition of longitudinal cell elongation and acceleration of transverse cell enlargement under Fe deficiency started from the tips and then extended towards the base during the time-course period. An increase in cell number also occurred behind the tips. In addition, the development of rhizodermal protrusions was observed on the surface of roots subjected to Fe deficiency. These results indicated that changes in cell size and number and in root hair development were all involved in root tip swelling.

References

Mar 28, 2008·Plant Physiology and Biochemistry : PPB·Ataru HigaYoshie Kitamura
Jun 2, 2010·Plant Signaling & Behavior·Keiichirou NemotoYoshihiro Mano
Dec 3, 2010·BMC Plant Biology·Silvia DonniniGraziano Zocchi
May 6, 2014·Frontiers in Plant Science·Dortje GolldackNina Probst
Jun 9, 2014·Plant Science : an International Journal of Experimental Plant Biology·Takanori Kobayashi, Naoko K Nishizawa

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