Root Morphology and Its Relationship with Nitrate Uptake in Kentucky Bluegrass

Sullivan, W. Michael; Jiang, Zhongchun; Hull, Richard T.

doi:10.2135/cropsci2000.403765x

Cited by 82 publications

(60 citation statements)

References 23 publications

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“…A wide intra-specific genetic variability was observed in sugar beet for root morphological and physiological traits in agreement with those found in Poa pratensis L. by Sullivan et al (2000), in Triticum aestivum L. by Manschadi et al (2008) and reviewed by Lynch (2007). Genetic variability is a prerequisite for the improvement of plant adaptation to the wide fluctuations of nutrient concentration that take place in the rhizosphere and affect crop yield (Lynch and Beebe 1995).…”

Section: Discussionsupporting

confidence: 76%

Root traits and yield in sugar beet: identification of AFLP markers associated with root elongation rate

2009

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Morpho-physiological and molecular analysis were conducted to identify useful root indexes of sugar beet nutrient uptake capacity and productivity. Root architectural parameters, root elongation rate, sulfate uptake rate and glucose and fructose content in the root apex, traits involved in the plant response to sulfate stress, were evaluated in 18 sugar beet genotypes characterized by different root yield. Morpho-physiological traits, determined on 11-day-old seedlings grown in hydroponics under sulfate deprivation, showed variations from 59 to 197% and were significantly correlated (P<0.01) with root yield. Under field conditions, the highest root yield genotype (L18), which has the highest root phenotypic values following sulfate shortage, also showed the greatest root length density and leaf relative water content, with respect to the lowest root yield genotype (L01). Bulk segregant analysis based on AFLP analysis, done on a segregating progeny obtained from the cross between the two lines L01 9 L18, allowed the identification of two AFLP markers associated to the root elongation rate parameter that showed the highest variation among all the analyzed root traits. The genetic diversity of root adaptive traits and the use of marker-assisted selection aimed at increasing sugar yield under water and nutrient stress in sugar beet breeding programmes are discussed

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Section: Discussionsupporting

confidence: 76%

Root traits and yield in sugar beet: identification of AFLP markers associated with root elongation rate

2009

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“…As root growth and maintenance are energetically costly, root architecture is a lever to optimize the balance between nitrogen absorption ability and metabolic cost (Lynch 2014). From this perspective, increasing the root surface by increasing fine root density has been considered as one possible strategy in other crops (White et al 2013) such as maize (Wiesler and Horst 1994), faba beans (Kage 1997), and Kentucky bluegrass (Sullivan et al 2000).…”

Section: Nitrogen Uptake Efficiency Must Be Improved To Maintain a Himentioning

confidence: 99%

Nitrogen use efficiency in rapeseed. A review

Bouchet

Laperche

Bissuel-Bélaygue

et al. 2016

Agron. Sustain. Dev.

179

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Mineral nitrogen fertilization has improved crop yield over the last century but has also caused air and water pollution. Reduction of nitrogen inputs and maintaining high yields are therefore essential to ensure a more sustainable agriculture. Improving the nitrogen use efficiency (NUE) of crops is therefore needed. Rapeseed, Brassica napus, depends on nitrogen fertilization due to its low NUE, with the ratio of plant nitrogen content to nitrogen supplied often not exceeding 60 %. Here, we review the major phenotypic traits associated with NUE in B. napus, with special emphasis on winter oilseed rape. We discuss the genetic diversity available and potential breeding strategies. The major points are the following: (1) rapeseed seed yield elaboration is complex, with overlapping phases of nitrogen uptake and remobilization during the crop cycle; (2) traits related to nitrogen uptake, such as root length and the amount of nitrogen absorbed after flowering, and traits related to nitrogen remobilization, such as the "staygreen" phenotype, have been identified as possible levers to improve NUE in rapeseed; (3) a substantial body of studies investigating the genetic control of NUE traits have already published and potential candidate genes identified; and (4) rapeseed genetic diversity may be enriched by exploiting interpopulation genetic variation and the closely related gene pools of Brassica rapa and Brassica oleracea.

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“…The root in different diameters was great differences in capacity for nutrient uptake, stronger in fine roots than coarse roots [12]. The fine root length was the largest proportion in the total root length, but decreased in fine root, middle Note: *represent significant differences for the same genotype between K deficiency and CK at 5% level.…”

Section: Root Lengthmentioning

confidence: 99%

“…Higher root activity could permit crops to acquire largely nutrient from soil, especially under abiotic stress. The root in different diameters was great differences in capacity for nutrient uptake, stronger in fine roots than coarse roots [12]. Various nutrient elements in plants were interrelationship with potassium, such as N, P, Na and Ca, etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Potassium Deficiency on Root Growth and Nutrient Uptake in Maize (Zea mays L.)

Du¹,

Zhao²,

Jiang³

et al. 2017

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Potassium (K) is an essential nutrient on the growth and development for maize (Zea Mays L.). And the developed root morphology and root activity have great significance to nutrient absorption and play an important role in the growth and development of plants. To explore the response to K-deficiency on root growth and nutrient absorption of maize, two inbred lines, 90-21-3 (Tolerance to K deficiency) and D937 (Sensitive to K deficiency) were carried out to investigate the root morphology, root activity, nutrient uptake and related traits. The results showed that K-deficiency inhibited the root growth of 90-21-3 and D937, but increased the ratio of root to shoot (R/S). The total length, root surface area, the root diameter and root volume of root system of 90-21-3 and D937 were significantly decreased by K deficiency, especially the fine root (0 -0.4 mm) in root length and root surface area. In addition, the K concentration of root in the two lines was significantly decreased, but root activity was significantly improved, which promoted the absorption of the root system to Na + . Compared with D937, 90-21-3 was able to distribute more carbohydrates from shoot to the root system under K deficiency, alleviating the inhibition of root growth. The fine root system was the main part for absorption nutrient. The length and surface area of 90-12-3 were no difference, and significantly decreased by 12.90% and 17.65% in D937 after 5 d of K deficiency. As well, the root activity of 90-21-3 was significantly increased when encountered to K deficiency, which promoted the accumulation of Na + and Ca 2+ and regulated the osmotic stress. Therefore, it could be a responding mechanism for tolerance crop by maintaining large root system, increasing root activity and adjusting nutrient absorption to adapt to K deficiency.

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Root Morphology and Its Relationship with Nitrate Uptake in Kentucky Bluegrass

Cited by 82 publications

References 23 publications

Root traits and yield in sugar beet: identification of AFLP markers associated with root elongation rate

Root traits and yield in sugar beet: identification of AFLP markers associated with root elongation rate

Nitrogen use efficiency in rapeseed. A review

Effect of Potassium Deficiency on Root Growth and Nutrient Uptake in Maize (Zea mays L.)

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