Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions
2016
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Аутори
Pavlović, JelenaSamardžić, Jelena
Kostić, Ljiljana
Laursen, Kristian H.
Natić, Maja M.
Timotijević, Gordana
Schjoerring, Jan K.
Nikolić, Miroslav
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Background and Aims Retranslocation of iron (Fe) from source tissues enhances plant tolerance to Fe deficiency. Previous work has shown that silicon (Si) can alleviate Fe deficiency by enhancing acquisition and root to shoot translocation of Fe. Here the role of Si in Fe mobilization in older leaves and the subsequent retranslocation of Fe to young leaves of cucumber (Cucumis sativus) plants growing under Fe-limiting conditions was investigated. Methods Iron (Fe-57 or naturally occurring isotopes) was measured in leaves at different positions on plants hydroponically growing with or without Si supply. In parallel, the concentration of the Fe chelator nicotianamine (NA) along with the expression of nicotianamine synthase (NAS) involved in its biosynthesis and the expression of yellow stripe-like (YSL) transcripts mediating Fe-NA transport were also determined. Key Results In plants not receiving Si, approximately half of the total Fe content remained in the oldest leaf. In contrast, Si-...treated plants showed an almost even Fe distribution among leaves with four different developmental stages, thus providing evidence of enhanced Fe remobilization from source leaves. This Si-stimulated Fe export was paralleled by an increased NA accumulation and expression of the YSL1 transporter for phloem loading/unloading of the Fe-NA complex. Conclusions The results suggest that Si enhances remobilization of Fe from older to younger leaves by a more efficient NA-mediated Fe transport via the phloem. In addition, from this and previous work, a model is proposed of how Si acts to improve Fe homeostasis under Fe deficiency in cucumber.
Кључне речи:
yellow stripe-like (YSL) transporters / silicon / phloem transport / nicotianamine / nicotianamine synthase (NAS) / leaves / iron retranslocation / Cucumber (Cucumis sativus)Извор:
Annals of Botany, 2016, 118, 2, 271-280Издавач:
- Oxford Univ Press, Oxford
Финансирање / пројекти:
- Минерални стрес и адаптације биљака на маргиналним пољопривредним земљиштима (RS-MESTD-Basic Research (BR or ON)-173028)
- Innovation Fund Denmark
DOI: 10.1093/aob/mcw105
ISSN: 0305-7364
PubMed: 27371693
WoS: 000383179200014
Scopus: 2-s2.0-84982135091
Институција/група
Institut za molekularnu genetiku i genetičko inženjerstvoTY - JOUR AU - Pavlović, Jelena AU - Samardžić, Jelena AU - Kostić, Ljiljana AU - Laursen, Kristian H. AU - Natić, Maja M. AU - Timotijević, Gordana AU - Schjoerring, Jan K. AU - Nikolić, Miroslav PY - 2016 UR - https://imagine.imgge.bg.ac.rs/handle/123456789/926 AB - Background and Aims Retranslocation of iron (Fe) from source tissues enhances plant tolerance to Fe deficiency. Previous work has shown that silicon (Si) can alleviate Fe deficiency by enhancing acquisition and root to shoot translocation of Fe. Here the role of Si in Fe mobilization in older leaves and the subsequent retranslocation of Fe to young leaves of cucumber (Cucumis sativus) plants growing under Fe-limiting conditions was investigated. Methods Iron (Fe-57 or naturally occurring isotopes) was measured in leaves at different positions on plants hydroponically growing with or without Si supply. In parallel, the concentration of the Fe chelator nicotianamine (NA) along with the expression of nicotianamine synthase (NAS) involved in its biosynthesis and the expression of yellow stripe-like (YSL) transcripts mediating Fe-NA transport were also determined. Key Results In plants not receiving Si, approximately half of the total Fe content remained in the oldest leaf. In contrast, Si-treated plants showed an almost even Fe distribution among leaves with four different developmental stages, thus providing evidence of enhanced Fe remobilization from source leaves. This Si-stimulated Fe export was paralleled by an increased NA accumulation and expression of the YSL1 transporter for phloem loading/unloading of the Fe-NA complex. Conclusions The results suggest that Si enhances remobilization of Fe from older to younger leaves by a more efficient NA-mediated Fe transport via the phloem. In addition, from this and previous work, a model is proposed of how Si acts to improve Fe homeostasis under Fe deficiency in cucumber. PB - Oxford Univ Press, Oxford T2 - Annals of Botany T1 - Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions EP - 280 IS - 2 SP - 271 VL - 118 DO - 10.1093/aob/mcw105 ER -
@article{ author = "Pavlović, Jelena and Samardžić, Jelena and Kostić, Ljiljana and Laursen, Kristian H. and Natić, Maja M. and Timotijević, Gordana and Schjoerring, Jan K. and Nikolić, Miroslav", year = "2016", abstract = "Background and Aims Retranslocation of iron (Fe) from source tissues enhances plant tolerance to Fe deficiency. Previous work has shown that silicon (Si) can alleviate Fe deficiency by enhancing acquisition and root to shoot translocation of Fe. Here the role of Si in Fe mobilization in older leaves and the subsequent retranslocation of Fe to young leaves of cucumber (Cucumis sativus) plants growing under Fe-limiting conditions was investigated. Methods Iron (Fe-57 or naturally occurring isotopes) was measured in leaves at different positions on plants hydroponically growing with or without Si supply. In parallel, the concentration of the Fe chelator nicotianamine (NA) along with the expression of nicotianamine synthase (NAS) involved in its biosynthesis and the expression of yellow stripe-like (YSL) transcripts mediating Fe-NA transport were also determined. Key Results In plants not receiving Si, approximately half of the total Fe content remained in the oldest leaf. In contrast, Si-treated plants showed an almost even Fe distribution among leaves with four different developmental stages, thus providing evidence of enhanced Fe remobilization from source leaves. This Si-stimulated Fe export was paralleled by an increased NA accumulation and expression of the YSL1 transporter for phloem loading/unloading of the Fe-NA complex. Conclusions The results suggest that Si enhances remobilization of Fe from older to younger leaves by a more efficient NA-mediated Fe transport via the phloem. In addition, from this and previous work, a model is proposed of how Si acts to improve Fe homeostasis under Fe deficiency in cucumber.", publisher = "Oxford Univ Press, Oxford", journal = "Annals of Botany", title = "Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions", pages = "280-271", number = "2", volume = "118", doi = "10.1093/aob/mcw105" }
Pavlović, J., Samardžić, J., Kostić, L., Laursen, K. H., Natić, M. M., Timotijević, G., Schjoerring, J. K.,& Nikolić, M.. (2016). Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions. in Annals of Botany Oxford Univ Press, Oxford., 118(2), 271-280. https://doi.org/10.1093/aob/mcw105
Pavlović J, Samardžić J, Kostić L, Laursen KH, Natić MM, Timotijević G, Schjoerring JK, Nikolić M. Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions. in Annals of Botany. 2016;118(2):271-280. doi:10.1093/aob/mcw105 .
Pavlović, Jelena, Samardžić, Jelena, Kostić, Ljiljana, Laursen, Kristian H., Natić, Maja M., Timotijević, Gordana, Schjoerring, Jan K., Nikolić, Miroslav, "Silicon enhances leaf remobilization of iron in cucumber under limited iron conditions" in Annals of Botany, 118, no. 2 (2016):271-280, https://doi.org/10.1093/aob/mcw105 . .