PloS one, 2021-02, Vol.16 (2), p.e0246944
2021
Details
- Autor(en) / Beteiligte
- Titel
- Effects of phosphorus deficiency on the absorption of mineral nutrients, photosynthetic system performance and antioxidant metabolism in Citrus grandis
- Ist Teil von
- PloS one, 2021-02, Vol.16 (2), p.e0246944
- Ort / Verlag
- United States: Public Library of Science
- Erscheinungsjahr
- 2021
- Link zum Volltext
- Quelle
- Electronic Journals Library
- Beschreibungen/Notizen
- Phosphorus (P) is an essential macronutrient for plant growth, development and production. However, little is known about the effects of P deficiency on nutrient absorption, photosynthetic apparatus performance and antioxidant metabolism in citrus. Seedlings of 'sour pummelo' (Citrus grandis) were irrigated with a nutrient solution containing 0.2 mM (Control) or 0 mM (P deficiency) KH2PO4 until saturated every other day for 16 weeks. P deficiency significantly decreased the dry weight (DW) of leaves and stems, and increased the root/shoot ratio in C. grandis but did not affect the DW of roots. The decreased DW of leaves and stems might be induced by the decreased chlorophyll (Chl) contents and CO2 assimilation in P deficient seedlings. P deficiency heterogeneously affected the nutrient contents of leaves, stems and roots. The analysis of Chl a fluorescence transients showed that P deficiency impaired electron transport from the donor side of photosystem II (PSII) to the end acceptor side of PSI, which showed a greater impact on the performance of the donor side of PSII than that of the acceptor side of PSII and photosystem I (PSI). P deficiency increased the contents of ascorbate (ASC), H2O2 and malondialdehyde (MDA) as well as the activities of superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), dehydroascorbate reductase (DHAR) and glutathione reductase (GR) in leaves. In contrast, P deficiency increased the ASC content, reduced the glutathione (GSH) content and the activities of SOD, CAT, APX and monodehydroascorbate reductase (MDHAR), but did not increase H2O2 production, anthocyanins and MDA content in roots. Taking these results together, we conclude that P deficiency affects nutrient absorption and lowers photosynthetic performance, leading to ROS production, which might be a crucial cause of the inhibited growth of C. grandis.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 1932-6203eISSN: 1932-6203DOI: 10.1371/journal.pone.0246944Titel-ID: cdi_plos_journals_2490579586
- Format
- –
- Schlagworte
- Absorption, Physiological, Acidic soils, Acidification, Acids, Adaptation, Aerobic respiration, Agriculture, Aluminum, Analysis, Anthocyanins - metabolism, Antioxidants, Antioxidants - metabolism, Atmospheric oxygen, Barley, Biology and Life Sciences, Botanical research, Carbohydrates, Carbon Dioxide - metabolism, Chlorophyll, Chlorophyll - metabolism, Citrus, Citrus - genetics, Citrus - growth & development, Citrus - metabolism, Citrus fruits, Corn, Crops, Depletion, Eutrophication, Fertilizers, Fluorescence, Gene Expression Regulation, Plant, Grapefruit, Health aspects, Hydrogen, Hydrogen peroxide, Hydrogen Peroxide - metabolism, Hydroxyl radicals, Medicine and Health Sciences, Metabolism, Metabolome, Minerals - metabolism, Nutrients, Nutrients - metabolism, Nutritional aspects, Orchards, Organelles, Organic acids, Oxygen, Phosphorus, Phosphorus - deficiency, Phosphorus in the body, Photosynthesis, Photosynthesis - genetics, Physiological aspects, Plant Leaves - metabolism, Plant Roots - metabolism, Plant Shoots - metabolism, Plant Stems - metabolism, Production costs, Reactive oxygen species, Seedlings - metabolism, Seeds, Signal transduction, Singlet oxygen, Soil acidification, Superoxide anions, Thiobarbituric Acid Reactive Substances - metabolism, Waterways