Effects of high NH+4 on K+ uptake, culm mechanical strength and grain filling in wheat
| العنوان: | Effects of high NH+4 on K+ uptake, culm mechanical strength and grain filling in wheat |
|---|---|
| المؤلفون: | Jia Liu, Jisheng Si, Bo Feng, Wang Fahong, Shengdong Li, Bin Zhang, Li Huawei, Kong Ling'an, Mingze Sun |
| المصدر: | Frontiers in Plant Science, Vol 5 (2014) Frontiers in Plant Science |
| بيانات النشر: | Frontiers Media SA, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Ammonium (NH4+), N remobilization, inorganic chemicals, Chemistry, Moderate level, ammonium (NH+4), food and beverages, chemistry.chemical_element, Plant Science, lcsh:Plant culture, Grain filling, Vascular bundle, Nitrogen, chemistry.chemical_compound, Plant development, Animal science, wheat (Triticum aestivum L.), Botany, Mechanical strength, K+ flux, Lignin, lcsh:SB1-1110, Original Research Article, Cellulose, culm mechanical strength |
| الوصف: | It is well established that a high external NH(+) 4 concentration depresses many processes in plant development, but the underlying mechanisms are still not well understood. To determine whether the negative effects of high levels of NH(+) 4 are related to competitive cation uptake, wheat was grown in a field with moderate (18 g N m(-2)) and high (30 g N m(-2)) supplies of NH(+) 4 in the presence or absence of additional K(+) (6 g K2O m(-2)) to examine culm mechanical strength, the main components of the vascular bundle, nitrogen (N) remobilization and the grain-filling rate. The results indicated that an excessive supply of NH(+) 4 significantly decreased culm mechanical strength, the cellulose and lignin contents of vascular bundles, the N remobilization efficiency (NRE) and the grain-filling rate compared with a moderate level of NH(+) 4. The additional provision of K(+) considerably alleviated these negative effects of high NH(+) 4, resulting in a 19.41-26.95% increase in culm mechanical strength during grain filling and a 34.59% increase in the NRE. An assay using the scanning ion-selective electrode technique (SIET) showed that the net rate of transmembrane K(+) influx decreased by 84.62%, and measurements using flame photometry demonstrated that the K(+) content decreased by 36.13% in wheat plants subjected to high NH(+) 4. This study indicates that the effects of high NH(+) 4 on culm mechanical strength, cellulose and lignin contents, the NRE and the grain-filling rate are probably associated with inhibition of K(+) uptake in wheat. |
| تدمد: | 1664-462X |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b22b07cfd39e849faaadc9a693e385d4Test https://doi.org/10.3389/fpls.2014.00703Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....b22b07cfd39e849faaadc9a693e385d4 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1664462X |
|---|