Effect of cadmium on pollen germination and tube growth in Lilium longiflorum and Nicotiana tabacum.

Protoplasma
T Sawidis

Abstract

Cadmium had a highly toxic effect on pollen germination and tube growth, which were greatly inhibited as metal concentrations increased. Cadmium concentrations up to 10(-2) M completely stopped pollen germination and pollen showed an increasing tendency to burst within 1 h. At low concentrations, the metal caused a slight stimulation of pollen germination, growth rate and tube elongation at the initial stages of tube development. Comparing the two plants studied, cadmium was more toxic for Nicotiana tabacum than for Lilium longiflorum pollen. Pollen tubes showed a range of strong morphological abnormalities, characterized by uneven or aberrant growth, including apical branching or swelling at the tip of the pollen tube. Cell wall intrusions at or near the tip were evident on the inner side, whereas a loose network formed from fibrillar material was observed on the outer layers. After prolonged cadmium exposure, round (ball-like) aggregates were embedded in a fine fibrillar network. Increased cadmium concentrations (10(-3)-10(-2) M) decreased or completely paralyzed cytoplasmic streaming. No typical cytoplasmic zonation existed, while cell organelles (plastids, lipid droplets) were relocated toward the tip. The vesicular apical ...Continue Reading

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Citations

Mar 12, 2011·Biological Trace Element Research·Fariba MohsenzadehNafiseh Yousefi
Oct 15, 2013·Protoplasma·Thomas SawidisMaria Voulgaropoulou
Sep 18, 2012·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Maria BreyginaIgor Yermakov
Apr 2, 2015·Plant Signaling & Behavior·Xiaoxia WangXianyong Sheng
Jan 13, 2015·International Journal of Phytoremediation·Wending XuZhi Dang
Apr 17, 2016·Environmental Science and Pollution Research International·Tingting MaYongming Luo
Dec 6, 2017·Protoplasma·Thomas SawidisElzbieta Weryszko-Chmielewska
Jan 12, 2019·Metallomics : Integrated Biometal Science·Marwa A IsmaelChengxiao Hu
May 16, 2019·Environmental Science and Pollution Research International·Xiaohan XuHanqi Yang
Jul 26, 2018·International Journal of Molecular Sciences·Marwa A IsmaelCheng Xiao Hu
Aug 25, 2019·International Journal of Molecular Sciences·Michiel HuybrechtsSophie Hendrix

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