2019
DOI: 10.1111/nph.16020
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Role of cis‐zeatin in root responses to phosphate starvation

Abstract: Summary Phosphate (Pi) is an essential nutrient for all organisms. Roots are underground organs, but the majority of the root biology studies have been done on root systems growing in the presence of light. Root illumination alters the Pi starvation response (PSR) at different intensities. Thus, we have analyzed morphological, transcriptional and physiological responses to Pi starvation in dark‐grown roots. We have identified new genes and pathways regulated by Pi starvation that were not described previousl… Show more

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Cited by 79 publications
(78 citation statements)
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References 75 publications
(111 reference statements)
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“…Cytokinin seems to act as a local and systemic signal to coordinate the demand and acquisition of N. The pharmacological application of cytokinin represses AtNRT2 genes, including NRT2.4, which are induced during N deficiency in roots [25]. Among the different cytokinins, tZ seems to have an important role in the control of stem cell activity in the shoot apical meristem in response to nitrate levels [27], while cZ plays an important role during phosphate starvation [20]. Our data show that both isomers cZ and tZ abolish the expression of NRT2.4 in the root tip but not in LRs, suggesting that zeatins might favor N acquisition from a shallow-lateral root system.…”
Section: Discussionmentioning
confidence: 99%
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“…Cytokinin seems to act as a local and systemic signal to coordinate the demand and acquisition of N. The pharmacological application of cytokinin represses AtNRT2 genes, including NRT2.4, which are induced during N deficiency in roots [25]. Among the different cytokinins, tZ seems to have an important role in the control of stem cell activity in the shoot apical meristem in response to nitrate levels [27], while cZ plays an important role during phosphate starvation [20]. Our data show that both isomers cZ and tZ abolish the expression of NRT2.4 in the root tip but not in LRs, suggesting that zeatins might favor N acquisition from a shallow-lateral root system.…”
Section: Discussionmentioning
confidence: 99%
“…N starvation did not reduce root growth in fip1-2 compared with control seedlings ( Figure 1A,B). As root illumination has a negative effect on root growth during nutrient deficiency conditions [18][19][20], we decided to analyze the effect of root illumination in a medium containing different concentrations of N. In control seedlings, decreasing the level of N reduced root growth, and this reduction was significantly higher in light grown-root seedlings (LGR) than dark-grown root seedlings (DGR) ( Figure 1C), showing an interaction between light and N deprivation. However, these differences in root growth were not observed in fip1-2 mutant ( Figure 1C), that was only influenced by the total lack of N in the medium, but not by the light.…”
Section: Fip1-2 Mutant Has An Altered N Starvation Response In Rootsmentioning
confidence: 99%
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“…Taking all our observations into account, the use of the D-Root system represents an improvement for the analyses of root cell types, since protoplasts can be efficiently obtained and roots are grown in conditions more similar to nature. Thus, using the D-Root device prevents the influence of root illumination in the process under study, which in many cases could have a strong and negative impact [9,36]. Therefore, FACS in combination with the D-Root device is a good solution to disentangle the molecular mechanisms regulating cell types for specific development and responses to adverse conditions.…”
Section: Discussionmentioning
confidence: 99%