Plant mineral nutrition is essential for crop yields and human health.However,the uneven distribution of mineral elements over time and space leads to a lack or excess of available mineral elements in plants.Among the...Plant mineral nutrition is essential for crop yields and human health.However,the uneven distribution of mineral elements over time and space leads to a lack or excess of available mineral elements in plants.Among the essential nutrients,calcium(Ca^(2+))stands out as a prominent second messenger that plays crucial roles in response to extracellular stimuli in all eukaryotes.Distinct Ca^(2+)signatures with unique parameters are induced by different stresses and deciphered by various Ca^(2+)sensors.Recent research on the participation of Ca^(2+)signaling in regulation of mineral elements has made great progress.In this review,we focus on the impact of Ca^(2+)signaling on plant mineral uptake and detoxification.Specifically,we emphasize the significance of Ca^(2+)signaling for regulation of plant mineral nutrition and delve into key points and novel avenues for future investigations,aiming to offer new insights into plant ion homeostasis.展开更多
Iron (Fe) migration in soil-plants is a critical part of Fe biogeochemical cycling in the earth surface system. Fe isotope fractionation analysis in the soil-rice system is promising for quantitatively assessing vario...Iron (Fe) migration in soil-plants is a critical part of Fe biogeochemical cycling in the earth surface system. Fe isotope fractionation analysis in the soil-rice system is promising for quantitatively assessing various pathways and clarifying Fe transformation processes. However, the mechanisms of Fe isotope fractionation in the soil-rice system are not well understood. In this study, the Fe isotopic compositions (δ^(56)Fe) of rhizosphere soils, pore water, Fe plaque, and rice plant tissues at the jointing and mature stages of the plants were determined. The rice plants were slightly enriched in heavier δ^(56)Fe by 0.3‰ relative to the soil, and the stele and cortex showed similar δ^(56)Fe values, indicating that the uptake of Fe by rice plants predominantly occurred via Fe(III)-phytosiderophores (Fe(III)-PS) chelation, but not Fe(III) reduction. Additionally, at both the jointing and mature stages, the rice plant tissues showed similar δ^(56)Fe values. However, the Fe isotope fractionation between the roots and stems (Δ56Feroot−stem) was 1.39 ± 0.13‰, which is similar to the previously Ab initio-calculated values between Fe(III)-citrate and Fe(III)- 2-deoxymugineic acid (DMA), indicating that both the phloem and xylem have similar δ^(56)Fe values, and the major Fe-chelating substances in the phloem of the rice plants are Fe(III)-DMA and Fe(II)- Nicotianamine (NA). Therefore, this study demonstrates that Fe isotope fractionation can be used as a signature for interpreting the Fe uptake and translocation mechanism in the soil-rice system.展开更多
基金supported by the National Natural Science Foundation of China(32222008 to C.W.)the China Postdoctoral Science Foundation(2023M732883 to C.J.).
文摘Plant mineral nutrition is essential for crop yields and human health.However,the uneven distribution of mineral elements over time and space leads to a lack or excess of available mineral elements in plants.Among the essential nutrients,calcium(Ca^(2+))stands out as a prominent second messenger that plays crucial roles in response to extracellular stimuli in all eukaryotes.Distinct Ca^(2+)signatures with unique parameters are induced by different stresses and deciphered by various Ca^(2+)sensors.Recent research on the participation of Ca^(2+)signaling in regulation of mineral elements has made great progress.In this review,we focus on the impact of Ca^(2+)signaling on plant mineral uptake and detoxification.Specifically,we emphasize the significance of Ca^(2+)signaling for regulation of plant mineral nutrition and delve into key points and novel avenues for future investigations,aiming to offer new insights into plant ion homeostasis.
基金This work was supported by the National Natural Science Foundation of China(Grant Nos.41807026,42030702,and U20A20109)China Postdoctoral Science Foundation(Grant Nos.2020T130126 and 2019M662820)+3 种基金Guangdong Key Research and Development Project(Grant Nos.2019B110207002)Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(Grant Nos.2017BT01Z176)projects of Science and Technology Development in Guangdong Academy of Sciences(Grant Nos.2020GDASYL-20200104022 and 2019GDASYL-0103054)Guangdong Special Support Plan for High-Level Talents(Grant Nos.2017TX04Z175).
文摘Iron (Fe) migration in soil-plants is a critical part of Fe biogeochemical cycling in the earth surface system. Fe isotope fractionation analysis in the soil-rice system is promising for quantitatively assessing various pathways and clarifying Fe transformation processes. However, the mechanisms of Fe isotope fractionation in the soil-rice system are not well understood. In this study, the Fe isotopic compositions (δ^(56)Fe) of rhizosphere soils, pore water, Fe plaque, and rice plant tissues at the jointing and mature stages of the plants were determined. The rice plants were slightly enriched in heavier δ^(56)Fe by 0.3‰ relative to the soil, and the stele and cortex showed similar δ^(56)Fe values, indicating that the uptake of Fe by rice plants predominantly occurred via Fe(III)-phytosiderophores (Fe(III)-PS) chelation, but not Fe(III) reduction. Additionally, at both the jointing and mature stages, the rice plant tissues showed similar δ^(56)Fe values. However, the Fe isotope fractionation between the roots and stems (Δ56Feroot−stem) was 1.39 ± 0.13‰, which is similar to the previously Ab initio-calculated values between Fe(III)-citrate and Fe(III)- 2-deoxymugineic acid (DMA), indicating that both the phloem and xylem have similar δ^(56)Fe values, and the major Fe-chelating substances in the phloem of the rice plants are Fe(III)-DMA and Fe(II)- Nicotianamine (NA). Therefore, this study demonstrates that Fe isotope fractionation can be used as a signature for interpreting the Fe uptake and translocation mechanism in the soil-rice system.
