Time course of starch production and the key enzyme activities in the grains of four maize inbred lines (two high-starch and two low-starch lines) were studied. Accumulation of grain starch and its components in four maize inbred lines rose continuously after pollination and increased as a sigmoid curve during grain filling. The accumulation rates showed single-peak curves. The accumulation rates of starch and its components reached their peaks on 25–32 days after pollination (DAP), respectively. Activities of adenosine diphosphoglucose pyrophosphorylase (AGPPase) and starch synthase in the grains of four lines followed single-peak curves with the peaks on 24–31 DAP. The highest activity of the starch-branching enzyme (Q-enzyme) in the grains of both high-starch lines appeared on 23 DAP, but that of both low-starch inbred lines showed double-peak curves, the peaks being at 15–20 DAP and 30–35 DAP. There was significant positive correlation between AGPPase, soluble starch synthase (SSS), and starch granule-bound synthase (GBSS) activities. The results indicated the Q-enzyme had different expression patterns in the high-and the low-starch maize inbred lines, and that AGPPase, SSS, and GBSS activities were significantly and positively correlated with amylose, amylopectin, and starch accumulation rates in all lines.
Russian Journal of Plant Physiology – Springer Journals
Published: Jan 20, 2011
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