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Asymmetric transcriptomic signatures between the cob and florets in the maize ear under optimal- and low-nitrogen conditions at silking, and functional characterization of amino acid transporters ZmAAP4 and ZmVAAT3.

Pan X, Hasan MM, Li Y, Liao C, Zheng H, Liu R, Li X - J. Exp. Bot. (2015)

Bottom Line: Fourteen genes responsive specifically to LN provided potential molecular markers for N-efficient maize breeding.We further functionally characterized two newly identified broad-spectrum amino acid transporters, ZmAAP4 and ZmVAAT3, that showed distinct expression patterns in the cob and florets and potentially important roles in amino-N mobilization in the ear.While both proteins could transport various amino acids into yeast or Arabidopsis cells, ZmAAP4 appeared to have higher efficiencies than ZmVAAT3 in transporting seven out of 22 examined amino acids.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant Nutrition, China Agricultural University, Beijing 100193, China.

No MeSH data available.


Venn diagram of up-regulated and down-regulated genes in the cob versus the florets, under LN.
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Figure 4: Venn diagram of up-regulated and down-regulated genes in the cob versus the florets, under LN.

Mentions: LN resulted in differential expression (2-fold cutoff) of 588 genes in the cob and 195 genes in florets at the silking stage (Table 1). For genes with enhanced expression under LN, 258 genes were only detected in the cob, 64 genes only in florets, and 61 genes in both tissues (Fig. 4); for those with reduced expression under LN, 224 genes were detected only in the cob, 25 genes only in florets, and 45 in both tissues (Fig. 4).


Asymmetric transcriptomic signatures between the cob and florets in the maize ear under optimal- and low-nitrogen conditions at silking, and functional characterization of amino acid transporters ZmAAP4 and ZmVAAT3.

Pan X, Hasan MM, Li Y, Liao C, Zheng H, Liu R, Li X - J. Exp. Bot. (2015)

Venn diagram of up-regulated and down-regulated genes in the cob versus the florets, under LN.
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4588875&req=5

Figure 4: Venn diagram of up-regulated and down-regulated genes in the cob versus the florets, under LN.
Mentions: LN resulted in differential expression (2-fold cutoff) of 588 genes in the cob and 195 genes in florets at the silking stage (Table 1). For genes with enhanced expression under LN, 258 genes were only detected in the cob, 64 genes only in florets, and 61 genes in both tissues (Fig. 4); for those with reduced expression under LN, 224 genes were detected only in the cob, 25 genes only in florets, and 45 in both tissues (Fig. 4).

Bottom Line: Fourteen genes responsive specifically to LN provided potential molecular markers for N-efficient maize breeding.We further functionally characterized two newly identified broad-spectrum amino acid transporters, ZmAAP4 and ZmVAAT3, that showed distinct expression patterns in the cob and florets and potentially important roles in amino-N mobilization in the ear.While both proteins could transport various amino acids into yeast or Arabidopsis cells, ZmAAP4 appeared to have higher efficiencies than ZmVAAT3 in transporting seven out of 22 examined amino acids.

View Article: PubMed Central - PubMed

Affiliation: Department of Plant Nutrition, China Agricultural University, Beijing 100193, China.

No MeSH data available.