Two-day-old seedlings of maize (Zea mays L.) were incubated on 3 mM and 35 μM solutions of Sr(NO3)2, and the toxic effects of strontium were assessed by measuring, in the course of four days of incubation, the daily increments of the primary root length and also the root and shoot length by day 7 of incubation, and the length of the fully elongated cells. Sodium rhodizonate, a reagent developing the colored complex with Sr, was used to follow Sr distribution in maize tissues and organs following 2, 24, 48, and 168 h of incubation. Sr was found in all root tissues as soon as after 24 h of incubation; it accumulated mostly in the cell apoplast, whereas its content in the protoplasts was considerably lower. Strontium readily crossed the endodermal barrier via the symplast and was immobilized predominantly in the pericycle cell walls; therefore, it did not hamper root branching. Strontium did not affect the final cell length and hindered root growth (at the concentration of 3 mM) by inhibiting cell division. In the shoots, Sr was found in the xylem cell walls in the vascular bundles of coleoptile, mesocotyl, and leaves on the second day of incubation, an evidence for high Sr mobility. We conclude that the transport of Sr differs from the transport of such heavy metals, as Cd, Pb, and Ni, and is similar in many aspects to the distribution of calcium, another alkaline earth metal, probably due to similar physical and chemical properties of their ions.
Russian Journal of Plant Physiology – Springer Journals
Published: Oct 18, 2004
It’s your single place to instantly
discover and read the research
that matters to you.
Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.
All for just $49/month
Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly
Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.
Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.
Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.
All the latest content is available, no embargo periods.
“Hi guys, I cannot tell you how much I love this resource. Incredible. I really believe you've hit the nail on the head with this site in regards to solving the research-purchase issue.”Daniel C.
“Whoa! It’s like Spotify but for academic articles.”@Phil_Robichaud
“I must say, @deepdyve is a fabulous solution to the independent researcher's problem of #access to #information.”@deepthiw
“My last article couldn't be possible without the platform @deepdyve that makes journal papers cheaper.”@JoseServera