Root exudation index: screening organic acid exudation and phosphorus acquisition efficiency in soybean genotypes

2016 ◽  
Vol 67 (10) ◽  
pp. 1096 ◽  
Author(s):  
Vengavasi Krishnapriya ◽  
Renu Pandey
Keyword(s):  
Molecular Weight ◽  
Root Exudation ◽  
Growth And Yield ◽  
Yield Potential ◽  
Secretory Proteins ◽  
P Availability ◽  
Screening Process ◽  
Soil P ◽  
P Acquisition ◽  
Soybean Genotypes

High-molecular-weight secretory proteins and low-molecular-weight exudates (carboxylates, phenols, free amino acids and sugars) released from roots of soybean (Glycine max (L.) Merr.) differentially influence genotypic phosphorus (P) acquisition efficiency (PAE). We hypothesised that genotypes with higher root exudation potential would exhibit enhanced P acquisition, and screened 116 diverse soybean genotypes by labelling shoots with 14CO2. A root exudation index (REI) derived from total 14C in the root exudate at sufficient (250 μm) and low (4 μm) P levels was used to classify genotypes for PAE. Genotypes with REI >2.25 exhibited significantly higher exudation at low than at sufficient P, which in turn increased PAE. Under low P availability, efficient genotypes exude a greater quantity of organic compounds into the rhizosphere. This increases P availability to meet the crop requirement, enabling the crop to produce consistent biomass and seed yield with reduced fertiliser addition. Such maintenance of growth and yield potential by mining the inherent soil P is a favourable trait in genotypes, reducing dependence on P fertilisers. Measuring REI at seedling stage to select P-efficient plants accelerates the screening process by accommodating large numbers of genotypes.

Does the enhanced P acquisition by maize following legumes in a rotation result from improved soil P availability?

2007 ◽  
Vol 39 (10) ◽  
pp. 2555-2566 ◽  
Author(s):  
Pieter Pypers ◽  
Michael Huybrighs ◽  
Jan Diels ◽  
Robert Abaidoo ◽  
Erik Smolders ◽  
...  
Keyword(s):  
P Availability ◽  
Soil P ◽  
Soil P Availability ◽  
P Acquisition

PHOSPHORUS-MOBILIZATION STRATEGY BASED ON CARBOXYLATE EXUDATION IN LUPINS (LUPINUS, FABACEAE): A MECHANISM FACILITATING THE GROWTH AND PHOSPHORUS ACQUISITION OF NEIGHBOURING PLANTS UNDER PHOSPHORUS-LIMITED CONDITIONS

2016 ◽  
Vol 53 (2) ◽  
pp. 308-319 ◽  
Author(s):  
D. M. S. B. DISSANAYAKA ◽  
W. M. K. R. WICKRAMASINGHE ◽  
BUDDHI MARAMBE ◽  
JUN WASAKI
Keyword(s):  
Plant Species ◽  
Lupinus Albus ◽  
Available P ◽  
White Lupin ◽  
P Availability ◽  
Soil P ◽  
Positive Effects ◽  
P Acquisition ◽  
P Pools ◽  
Carboxylate Exudation

SUMMARYThe capability of some plant species to mobilize phosphorus (P) from poorly available soil P fractions can improve P availability for P-inefficient plant species in intercropping. White lupin (Lupinus albus) has been investigated as a model P-mobilizing plant for its capability of enhancing the P acquisition of neighbouring species under P-limited conditions. To date, investigations have led to contrasting findings, where some reports have described a positive effect of intercropped lupins on companion plants, whereas others have revealed no effects. This review summarizes the literature related to lupin–cereal intercropping. It explores the underpinning mechanisms that influence interspecific facilitation of P acquisition. The P-mobilization-based facilitation by lupins to enhance P-acquisition of co-occurring plant species is determined by both available P concentration and P-sorption capacity of soil, and the root intermingling capacity among two plant partners enabling rhizosphere overlapping. In lupin–cereal intercropping, lupin enhances the below-ground concentration of labile P pools through mobilization of P from sparingly available P pools, which is accomplished through carboxylate exudation, where neighbouring species acquire part of the mobilized P. The non-P-mobilizing species benefit only under P-limited conditions when they immediately occupy the maximum soil volume influenced by P-mobilizing lupin. Positive effects of mixed cropping are apparent in alkaline, neutral and acidic soils. However, the facilitation of P acquisition by lupins to companion species is eliminated when soil becomes strongly P-sorbing. In such soils, the limitation of root growth can result in poorer root intermingling between two species. The P mobilized by lupins might not be acquired by neighbouring species because it is bound to P-sorbing compounds. We suggest that the lupins can be best used as P-mobilizing plant species to enhance P acquisition of P-inefficient species under P-limited conditions when plant species are grown with compatible crops and soil types that facilitate sharing of rhizosphere functions among intercropped partners.

Screening for Phosphorus (P) Acquisition Efficient Genotypes and Identification of Sequence Variations among P-Efficient and Inefficient Genotypes in Chickpea (Cicer arietinum L.)

2020 ◽  
Author(s):  
Arpita Das ◽  
Loyavar Ramchander ◽  
Raghunath Sadhukhan ◽  
Joydeep Banerjee ◽  
Krishnendu Pramanik
Keyword(s):  
Cicer Arietinum ◽  
Yield Potential ◽  
P Availability ◽  
Nucleotide Polymorphisms ◽  
Marker Assisted Breeding ◽  
Single Nucleotide ◽  
Cicer Arietinum L ◽  
P Acquisition ◽  
Sequence Variations ◽  
Low Phosphorus

Low phosphorus (P) availability is the major abiotic constraint in chickpea (Cicer arietinum L.) cultivation across the globe as well as in India. Present study contemplated to identify high P-acquisition efficient chickpea genotypes suitable for P-deficient regions and sequence variation was detected among the tested P-acquisition efficient and inefficient genotypes. Initial screening was conducted with 104 diverse chickpea genotypes at two locations characterized by P-sufficient and deficient conditions. A panel of 14 chickpea genotypes having contrasting P-acquisition efficiency was extracted for further assessment under P-sufficient and deficient conditions. Along with the significant genetic variations, the P-efficient chickpea genotypes had high P-acquisition efficiency than P-inefficient genotypes in both the conditions. P-acquisition efficient genotypes recorded high biomass and good yield potential in P-deficient condition in comparison to P-inefficient genotypes. Sequence analysis of the CaSPX3 domain containing protein gene from P-acquisition efficient and inefficient genotypes identified two single nucleotide polymorphisms in the 5¢ - untranslated region. Present findings might be of great importance in future marker-assisted breeding in chickpea especially for P-deficient soil.

scholarly journals Targeting Low-Phytate Soybean Genotypes Without Compromising Desirable Phosphorus-Acquisition Traits

2020 ◽  
Vol 11 ◽  
Author(s):  
Mireadili Kuerban ◽  
Wenfeng Jiao ◽  
Jiayin Pang ◽  
Jingying Jing ◽  
Li-Juan Qiu ◽  
...  
Keyword(s):  
Genotypic Variation ◽  
Root Traits ◽  
Dry Weight ◽  
Root Surface ◽  
Root Surface Area ◽  
Soil P ◽  
P Acquisition ◽  
P Concentration ◽  
Soybean Genotypes ◽  
Food And Feed

Phytate-phosphorus (P) in food and feed is not efficiently utilized by humans and non-ruminant livestock, potentially contributing to high losses of P to the environment. Crops with high P-acquisition efficiency can access soil P effectively. It remains elusive whether crop genotypes with high P-acquisition efficiency can also have low seed phytate concentrations. A core collection of 256 soybean [Glycine max (L.) Merr.] genotypes from China with diverse genetic background were grown in the same environment and seeds were sampled to screen for seed phytate-P concentration. Some of these genotypes were also grown in a low-P soil in the glasshouse to measure root morphological and physiological traits related to P acquisition. Large genotypic variation was found in seed phytate-P concentration (0.69–5.49 mg P g–1 dry weight), total root length, root surface area, rhizosheath carboxylates, and acid phosphatase activity in rhizosheath soil. Geographically, seed phytate-P concentration was the highest for the genotypes from Hainan Province, whereas it was the lowest for the genotypes from Inner Mongolia. Seed phytate-P concentration showed no correlation with any desirable root traits associated with enhanced P acquisition. Two genotypes (Siliyuan and Diliuhuangdou-2) with both low phytate concentrations and highly desirable P-acquisition traits were identified. This is the first study to show that some soybean genotypes have extremely low seed phytate concentrations, combined with important root traits for efficient P acquisition, offering material for breeding genotypes with low seed phytate-P concentrations.

scholarly journals Sex‐specific strategies of phosphorus (P) acquisition in Populus cathayana as affected by soil P availability and distribution

2019 ◽  
Vol 225 (2) ◽  
pp. 782-792 ◽  
Author(s):  
Zhichao Xia ◽  
Yue He ◽  
Lei Yu ◽  
Rubing Lv ◽  
Helena Korpelainen ◽  
...  
Keyword(s):  
P Availability ◽  
Soil P ◽  
Soil P Availability ◽  
P Acquisition ◽  
Populus Cathayana

Phosphorus and potassium nutrition of cotton: interaction with sodium

2010 ◽  
Vol 61 (10) ◽  
pp. 825 ◽  
Author(s):  
Ian J. Rochester
Keyword(s):  
Field Experiments ◽  
Growth And Yield ◽  
Yield Response ◽  
Cotton Leaf ◽  
P Availability ◽  
K Uptake ◽  
Sodic Soils ◽  
Soil Sodicity ◽  
Soil P ◽  
Na Uptake

Poor phosphorus (P) and potassium (K) nutrition limits the growth and yield of many cotton (Gossypium hirsutum L.) crops in Australia. The demand for nutrients from cotton crops has risen as yields have increased over the past 40 years, and some soils have become depleted in these nutrients. Cotton is commonly grown on sodic soils that are more prone to nutritional problems. A survey of thirty-one sites over four years in northern NSW, Australia included twelve sites that had sodic topsoil. However, available soil P and K at all sites were above established critical values for cotton crops. Soil sodicity was negatively correlated with available soil P and K, and positively with soil salinity and chloride. Cotton leaf P and K concentrations at flowering were negatively correlated with leaf sodium (Na) concentration. The cotton crops growing in sodic soils produced 20% less dry matter (3 weeks before crop defoliation) and crop P and K uptake was reduced by 23% and 25%, respectively, whereas Na uptake was 107% higher. High soil sodicity also reduced the uptake of micro-nutrients. Two field experiments in adjacent sodic and non-sodic areas on one farm showed a yield response to P fertiliser application at the non-sodic site only, but where soil P availability was above the accepted critical value. Application of K fertiliser did not increase crop K uptake or yield. The lower yield and poorer growth of irrigated cotton on sodic soils was related to higher Na uptake and lower P and K uptake, possibly due to restricted root growth in sodic soils.

scholarly journals Potensi Hasil dan Toleransi Galur-galur Inbrida Sorgum pada Tanah dengan Hara Fosfor Rendah

2019 ◽  
Vol 47 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Jorex Daniel Momongan ◽  
Trikoesoemaningtyas Trikoesoemaningtyas ◽  
Desta Wirnas ◽  
Dan Didy Sopandie
Keyword(s):  
Stress Tolerance ◽  
Acid Soil ◽  
Block Design ◽  
Plant Genetic Resources ◽  
Inbred Lines ◽  
Growth And Yield ◽  
Yield Potential ◽  
Tolerance Index ◽  
P Availability ◽  
P Deficiency

Sorghum development in Indonesia is directed towards cultivation in dryland and acid soil with low P availability. This research was aimed to obtain information on the performance of sorghum traits for selection in P deficient environment at early vegetative phase (3 weeks after planting), agronomic and yield potential traits in both P sufficient and P deficient environments, also to select high productivity sorghum genotypes which could tolerate P deficiency. The genetic materials used were 19 F7 recombinant inbred lines from a cross of B69 x Numbu developed under optimum condition (indirect breeding) by single seed decent. Variety Numbu and B69 used as checks. This research was conducted at The Indonesian Center for Biotechnology and Agriculture Plant Genetic Resources experimental field, Bogor, from May to September 2017. The experiment used a randomized complete block design with 3 replicates. The results showed that agronomic and yield traits varied among inbred lines under low P condition and optimum P condition. Adaptive lines showed better growth and yield compared to sensitive ones under low P condition. Plant height, panicle weight, and grain weight per panicle had high estimates of broad sense heritability. Selection based on stress tolerance index was able to identify inbred lines 286-6, 115-9, 114-7, 331-8, 170-9, 151-8, 104-7, 413-7, 68-5, 315-6, and 341-7 as tolerant to low P condition.Keywords: heritability, indirect breeding, optimum P condition, stress tolerance index

scholarly journals Growth and Yield Response of Maize (Zea mays L.) on Acid Soil to Different Rates of Humic Acid and NPK Fertilizer

2019 ◽  
Vol 4 (2) ◽  
pp. 76
Author(s):  
Putri Wulandari ◽  
Endang Sulistyaningsih ◽  
Suci Handayani ◽  
Benito Heru Purwanto
Keyword(s):  
Humic Acid ◽  
Acid Soil ◽  
Dry Weight ◽  
Growth And Yield ◽  
Yield Response ◽  
P Availability ◽  
Soil P ◽  
Soil P Availability ◽  
Npk Fertilizer ◽  
Total Dry Weight

The main constraint in the extensification of maize on the dry land of acid soil is the low availability of P in soil. This study aimed to determine the effect and the optimal dose of humic acid on the growth and yield of maize on acid soil. This research was conducted from February to May 2017 at Tri Dharma Field Laboratory, Faculty of Agriculture, Gadjah Mada University. Acid soil with low P availability used was from sub-district Cigudeg and Jasinga, West Java. The research was arranged in Randomized Complete Block Design (RCBD) with 2 factors. The first factor was maize cultivar, namely Bisi 2 and Pioneer 35. The second factor was the rate of humic acid and NPK fertilizer, consisting of 0 kg.ha-1 (without) NPK and 0% (without) humic acid, NPK + 0% (without) humic acid, NPK + 5% humic acid, NPK + 10% humic acid, and NPK + 15% humic acid. NPK fertilizer applied was NPK 16:16:16 at a dose of 350 kg.ha-1. The results showed that humic acid application on acid soil increased C-humic content in the soil, soil P availability, total dry weight of the plant, and kernel dry weight at harvest (15 weeks after planting). The increase in soil P availability did not improve the plant growth but increased the accumulation of plant biomass.  The application of humic acid at 15% (52.5 kg.ha-1) combined with NPK fertilizer on acid soil significantly increased total dry weight of plant and kernel dry weight up to 13.14% and 21.81%, respectively, thus, it is recommended for maize cultivation on acid soil. 

Sign in / Sign up

Export Citation Format

Share Document