Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field
Phosphorus (P) efficiency includes both P acquisition efficiency (PAE) and internal P utilization efficiency (PUE). Despite substantial research, genotypic variation in PAE and PUE remains incompletely understood in the field. A 2-year field study was conducted to compare PAE and PUE and related mor...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2018-11-01
|
| Series: | Frontiers in Plant Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fpls.2018.01614/full |
| _version_ | 1828911727536766976 |
|---|---|
| author | Yan Deng Yan Deng Wan Teng Yi-Ping Tong Xin-Ping Chen Chun-Qin Zou |
| author_facet | Yan Deng Yan Deng Wan Teng Yi-Ping Tong Xin-Ping Chen Chun-Qin Zou |
| author_sort | Yan Deng |
| collection | DOAJ |
| description | Phosphorus (P) efficiency includes both P acquisition efficiency (PAE) and internal P utilization efficiency (PUE). Despite substantial research, genotypic variation in PAE and PUE remains incompletely understood in the field. A 2-year field study was conducted to compare PAE and PUE and related morphological, physiological, and molecular root traits of two winter wheat cultivars (Triticum aestivum L. cv. SJZ8 and KN92) in response to six P application rates in a P-deficient calcareous soil. Both cultivars showed similar growth and yield potential at each P supply level, reaching optimal growth at the same P application rate of about 100 kg P ha-1. However, the two cultivars differed in how they achieved yield and P efficiency. As P supply increased for both cultivars, root dry weight (RDW), root length density, and expression of the phosphate transporter gene TaPHT1.2 in roots initially increased and then stabilized, but arbuscular mycorrhizal fungal colonization, rhizosphere acid phosphatase activity, expressions of the P-starvation marker gene TaIPS1.1 and the purple acid phosphatase gene TaPAP16 in roots initially decreased and then stabilized. To enhance P acquisition when the P supply was deficient, KN92 modified the morphology of its roots, while SJZ8 increased the physiological activities in its roots. With an adequate P supply, high expression of TaPHT1.2 in roots might account for efficient P uptake for both cultivars, especially for KN92. Although P uptake per RDW was similar for both cultivars at anthesis, PAE was higher for KN92 than SJZ8 in terms of total P uptake in aboveground parts, whereas shoot and grain PUE were higher in SJZ8 than in KN92, mainly during the reproductive growth stage. These results indicate that P efficiency is under genotypic control at all P supply levels tested in both wheat cultivars, and that the two cultivars depend on different root strategies for P acquisition and utilization in response to changes in the P supply. |
| first_indexed | 2024-12-13T19:07:46Z |
| format | Article |
| id | doaj.art-8996d1100194446bbc43305f83152f32 |
| institution | Directory Open Access Journal |
| issn | 1664-462X |
| language | English |
| last_indexed | 2024-12-13T19:07:46Z |
| publishDate | 2018-11-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Plant Science |
| spelling | doaj.art-8996d1100194446bbc43305f83152f322022-12-21T23:34:29ZengFrontiers Media S.A.Frontiers in Plant Science1664-462X2018-11-01910.3389/fpls.2018.01614417943Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the FieldYan Deng0Yan Deng1Wan Teng2Yi-Ping Tong3Xin-Ping Chen4Chun-Qin Zou5Key Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security, China Agricultural University, Beijing, ChinaHainan Key Laboratory for Sustainable Utilization of Tropical Bioresources, Hainan University, Haikou, ChinaThe State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, ChinaThe State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing, ChinaCollege of Resources and Environment, Southwest University, Chongqing, ChinaKey Laboratory of Plant-Soil Interactions, Ministry of Education, Center for Resources, Environment and Food Security, China Agricultural University, Beijing, ChinaPhosphorus (P) efficiency includes both P acquisition efficiency (PAE) and internal P utilization efficiency (PUE). Despite substantial research, genotypic variation in PAE and PUE remains incompletely understood in the field. A 2-year field study was conducted to compare PAE and PUE and related morphological, physiological, and molecular root traits of two winter wheat cultivars (Triticum aestivum L. cv. SJZ8 and KN92) in response to six P application rates in a P-deficient calcareous soil. Both cultivars showed similar growth and yield potential at each P supply level, reaching optimal growth at the same P application rate of about 100 kg P ha-1. However, the two cultivars differed in how they achieved yield and P efficiency. As P supply increased for both cultivars, root dry weight (RDW), root length density, and expression of the phosphate transporter gene TaPHT1.2 in roots initially increased and then stabilized, but arbuscular mycorrhizal fungal colonization, rhizosphere acid phosphatase activity, expressions of the P-starvation marker gene TaIPS1.1 and the purple acid phosphatase gene TaPAP16 in roots initially decreased and then stabilized. To enhance P acquisition when the P supply was deficient, KN92 modified the morphology of its roots, while SJZ8 increased the physiological activities in its roots. With an adequate P supply, high expression of TaPHT1.2 in roots might account for efficient P uptake for both cultivars, especially for KN92. Although P uptake per RDW was similar for both cultivars at anthesis, PAE was higher for KN92 than SJZ8 in terms of total P uptake in aboveground parts, whereas shoot and grain PUE were higher in SJZ8 than in KN92, mainly during the reproductive growth stage. These results indicate that P efficiency is under genotypic control at all P supply levels tested in both wheat cultivars, and that the two cultivars depend on different root strategies for P acquisition and utilization in response to changes in the P supply.https://www.frontiersin.org/article/10.3389/fpls.2018.01614/fullroot morphologyarbuscular mycorrhizal fungal colonizationacid phosphataseTaIPS1.1phosphate transporterphosphorus acquisition efficiency |
| spellingShingle | Yan Deng Yan Deng Wan Teng Yi-Ping Tong Xin-Ping Chen Chun-Qin Zou Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field Frontiers in Plant Science root morphology arbuscular mycorrhizal fungal colonization acid phosphatase TaIPS1.1 phosphate transporter phosphorus acquisition efficiency |
| title | Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field |
| title_full | Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field |
| title_fullStr | Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field |
| title_full_unstemmed | Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field |
| title_short | Phosphorus Efficiency Mechanisms of Two Wheat Cultivars as Affected by a Range of Phosphorus Levels in the Field |
| title_sort | phosphorus efficiency mechanisms of two wheat cultivars as affected by a range of phosphorus levels in the field |
| topic | root morphology arbuscular mycorrhizal fungal colonization acid phosphatase TaIPS1.1 phosphate transporter phosphorus acquisition efficiency |
| url | https://www.frontiersin.org/article/10.3389/fpls.2018.01614/full |
| work_keys_str_mv | AT yandeng phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield AT yandeng phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield AT wanteng phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield AT yipingtong phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield AT xinpingchen phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield AT chunqinzou phosphorusefficiencymechanismsoftwowheatcultivarsasaffectedbyarangeofphosphoruslevelsinthefield |