Relationships between shoot and root characteristics of white clover cultivars differing in response to phosphorus

Caradus, J. R.; Mackay, A. D.; Dunlop, James; Bosch, J. Van Den

doi:10.1080/01904169509365095

Cited by 12 publications

(10 citation statements)

References 32 publications

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“…But differences due to varieties and variety X nutrient level interaction were significant only in case of P. A negative correlation existed (r = -0.555; n =35) between SDW and RSR in case of P-stressed plants suggesting an increase in RDW production at the cost of SDW. Similar negative correlation between RSR and SDW was also reported by Caradus et al (1995). No such correlation was, however, observed in case of N-stressed plants.…”

Section: Resultssupporting

confidence: 72%

“…The work of last two decades has established sufficient evidence to believe that genotypic differences among crop species and varieties (in absorption and utilization of mineral nutrients) can be exploited to improve fertilizer-use efficiency, and to obtain higher productivity on nutrient deficient soils (Saric, 1987;Baligar and Fageria, 1990). Differential responses of different varieties of a crop to N (Sarma and Sarma, 1994;Jorgensen, 1997) and P (Caradus et al, 1995;Yan et al, 1995;Vegh et al, 1997) have been reported, making identification of nutrient efficient crops varieties a useful strategy for improving yields under low input agricultural systems in developing countries like Pakistan. Such exploitation will not only help in classifying the existing genetic material into nutrientefficient or inefficient, responsive or non-responsive but will also provide information/data base for future breeding ventures.…”

Section: Introductionmentioning

confidence: 99%

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Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.

Ahmad¹,

Gill²,

Shah³

et al. 1998

Pakistan J. of Biological Sciences

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Seven cotton (Gossypitn hirsuturn L.) varieties were evaluated for growth and utilization efficiency of nitrogen (N) and phosphorus (P), in hydroponics using modified Johnson's solutions containing adequate (6.0 mM N and 0.20 mM P), and deficient levels of N (0.8 mM) and P (0.01 mM). Substantial differences were observed among varieties for accumulation of shoot dry weight (SDW), relative reduction in shoot biomass due to N-deficiency (NSF), and uptake by shoot in case of N, and root dry weight (RDW), root:shoot ratio (RSR), relative reduction in shoot biomass due to P-deficiency (PSF), concentration in shoot and uptake by shoot in case of P. Variety SLS-1 exhibited the minimum stress at N-deficiency (NSF = 34%) as well as P-deficiency (PSF = 59%) among all the varieties. A negative correlation (r =0.555, n =35) between SDW and RSR in P-stressed plants suggested increase RDW production at the cost SDW. Utilization efficiency in varieties remained unchanged in case of N-deficiency stress and decreased in case of P-deficiency stress as compared to control, and in both the cases differences among varieties remained statistically non-significant. Nutrient level X variety interaction was significant for all the parameters studied in case of P, whereas for N, the interaction was significant only for shoot dry weight, stress factor and uptake by shoot.

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Section: Resultssupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.

Ahmad¹,

Gill²,

Shah³

et al. 1998

Pakistan J. of Biological Sciences

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“…Trifolium repens lack of yield response may be explained by the very small increases in shoot S concentration, even with very large inputs of S fertiliser. This is an unusual result, however, for a legume species considered to be high yielding with moderate to high fertiliser requirements (Caradus et al 1995). It was the only species to behave in this manner.…”

Section: S Responsementioning

confidence: 91%

“…Much research has been conducted into white clover (T. repens L.) dry matter (DM) and growth responses to added P in NZ (Caradus & Snaydon 1986;Caradus et al 1995). As such, highly productive clover species and pastures are generally adapted to highfertility soil conditions and do not perform well in infertile and/or acid soil conditions (Haynes & Williams 1993;Moir et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Sulphur and lime response of four adventive annual clovers grown in a New Zealand high country soil under glasshouse conditions

Maxwell

Moir

Edwards

2012

New Zealand Journal of Agricultural Research

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Adventive annual clovers play a critical role in nitrogen (N) cycling and feed quality in extensive summer-dry hill country, where traditionally sown white and subterranean clovers often fail to persist. However, very little is known about the edaphic (e.g. soil fertility) requirements of these species. The growth response and nutrient uptake of four adventive annual clovers to applied sulphur (S) or lime, grown in a typical low-fertility South Island high country soil, were investigated under glasshouse conditions and compared with white and subterranean clovers as reference species. The annual species had yield responses of 12Á17% or were unresponsive to S applications. Trifolium repens and T. striatum responded to liming at low lime rates, while all other species had negative yield responses to liming. Maximum yields were generally in the order of T. subterraneum ]T. arvense !T. striatum ]T. dubium!T. glomeratum !T. repens. For lime treatments, yields were strongly driven by phosphorus (P) availability, linked to soil pH. The data indicate that the adventive annual clovers are better adapted to low soil fertility (low pH and S) conditions, which in turn may be an important factor contributing to their success under South Island high country field conditions.

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“…Diversion of growth from shoot to root (higher RSR) is considered as a possible mechanism for plant adaptability under nutrient stress through efficient exploitation of culture medium (Fö hse, Claassen, and Jungk 1991). Some workers have suggested that an increase in RSR of the plants under nutrient stress is at the cost of SDM (Fredeen, Rao, and Terry 1989;Caradus, Makey, and Bosch 1995). This is generally attributed to the greater export of photosynthates from shoots to roots, mainly due to repressed sink activity in shoots (i.e., reduced leaf expansion and shoot growth rate).…”

Section: Discussionmentioning

confidence: 98%

Genetic Variations ofBrassicaCultivars for P Acquisition in a P Stress Environment and Comparison of P Sources for Sustainable Crop Management

Akhtar¹,

Oki²,

Adachi³

2009

Communications in Soil Science and Plant Analysis

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To compare the growth performance of Brassica in a phosphorus (P) stress environment and response to added P, six Brassica cultivars were grown in pots for 49 days after sowing, using a soil low in P [sodium bicarbonate (NaHCO 3 )-extractable P 5 3.97 mg kg 21 , Mehlich III-extractable P 5 6.13 mg kg 21 ] with (+P 5 60 mg P kg 21 soil) or without P addition (0P). Phosphorus-stress markedly reduced biomass accumulation and P uptake by roots and shoots. However, root-shoot ratio remained unaffected, implying that relative partitioning of biomass into roots and shoots had little role to play in shoot dry matter (SDM) production by cultivars. Biomass correlated significantly (P , 0.01) with total P uptake. Under P stress, the cultivars that produced greater root biomass were able to accumulate more total P content (r 5 0.95 ** ), which in turn was related positively to SDM and total biomass (r . 0.89 ** ) and negatively to P-stress factor (r 5 20.91 ** ). There was no correlation between P efficiency (PE) (relative shoot growth) and plant P, but PE showed a very significant correlation with shoot P content and SDM. Wide differences in growth and better performance of cultivars such as 'Brown Raya' and 'Con-1' under P stress encouraged screening of more germplasm, especially in the field, to identify Ptolerant cultivars. 3023In another study, potential relative agronomic effectiveness (RAE) of sparingly soluble P sources was investigated by growing two contrasting cultivars. The P sources incorporated into soil at 0, 10, 25, 50, and 100 mg P Kg 21 were (i) powdered Jordan rock P (RP), (ii) triple superphosphate (TSP), (iii) powdered low-grade TSP [TSP(PLG)], (iv) a mixture of RP + TSP compacted into pellets at 50:50 P ratio [RP + TSP(PelC)], and (v) a mixture of powdered RP + TSP at 50:50 P ratio [RP + TSP(PM)]. The RP was low in RAE and only 5 and 29% as effective as TSP in producing dry matter (DM) of P-sensitive 'B.S.A.' and P-tolerant 'Brown Raya' cultivars, respectively. There were no significant differences between TSP and RP + TSP(PelC) in DM yield of 'Brown Raya,' whereas, in the case of 'B.S.A.' RP + TSP(PM) was significantly less effective than RP + TSP(PelC) compared with TSP. Combined utilization of superior genome and P sources [such as TSP(PLG) and RP + TSP(PelC)] produced from low-grade RP (that cannot be used either for direct application or acidulated P fertilizers) can be used as an alternative strategy for sustainable crop production, especially in resource-poor environments. Further field trials at the level of cropping systems are needed.

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Relationships between shoot and root characteristics of white clover cultivars differing in response to phosphorus

Cited by 12 publications

References 32 publications

Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.

Differential Growth Behavior of Cotton Varieties at Adequate and Deficient Levels of Nitrogen and Phosphorus.

Sulphur and lime response of four adventive annual clovers grown in a New Zealand high country soil under glasshouse conditions

Genetic Variations ofBrassicaCultivars for P Acquisition in a P Stress Environment and Comparison of P Sources for Sustainable Crop Management

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