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Root Morphology Was Improved in a Late-Stage Vigor Super Rice Cultivar.

Huang M, Chen J, Cao F, Jiang L, Zou Y - PLoS ONE (2015)

Bottom Line: This study aimed to test the hypothesis that root morphology might be improved and consequently contributing to superior post-heading shoot growth and grain yield in late-stage vigor super rice.Specific root length and length and surface area of fine roots were higher in Y-liangyou 087 than in Teyou 838 at heading and maturity by more than 15%.These results indicated that root-shoot relationships were well balanced during post-heading phase in the late-stage vigor super rice cultivar Y-liangyou 087 by improving root morphology including avoiding a too great root biomass and developing a large fine root system.

View Article: PubMed Central - PubMed

Affiliation: Collaborative Innovation Center of Grain and Oil Crops in South China, Hunan Agricultural University, Changsha, China.

ABSTRACT
This study aimed to test the hypothesis that root morphology might be improved and consequently contributing to superior post-heading shoot growth and grain yield in late-stage vigor super rice. A pot experiment was carried out to compare yield attributes, shoot growth and physiological properties and root morphological traits between a late-stage vigor super rice cultivar (Y-liangyou 087) and an elite rice cultivar (Teyou 838). Grain yield and total shoot biomass were 7-9% higher in Y-liangyou 087 than in Teyou 838. Y-liangyou 087 had 60-64% higher post-heading shoot growth rate and biomass production than Teyou 838. Average relative chlorophyll concentration and net photosynthetic rate in flag leaves were 7-11% higher in Y-liangyou 087 than in Teyou 838 during heading to 25 days after heading. Y-liangyou 087 had 41% higher post-heading shoot N uptake but 17-25% lower root biomass and root-shoot ratio at heading and maturity than Teyou 838. Specific root length and length and surface area of fine roots were higher in Y-liangyou 087 than in Teyou 838 at heading and maturity by more than 15%. These results indicated that root-shoot relationships were well balanced during post-heading phase in the late-stage vigor super rice cultivar Y-liangyou 087 by improving root morphology including avoiding a too great root biomass and developing a large fine root system.

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Tiller number at heading and maturity of rice cultivars Y-liangyou 087 and Teyou 838.Vertical bars represent SD (n = 6). * indicates significant difference between the two cultivars according to LSD (0.05).
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pone.0142977.g001: Tiller number at heading and maturity of rice cultivars Y-liangyou 087 and Teyou 838.Vertical bars represent SD (n = 6). * indicates significant difference between the two cultivars according to LSD (0.05).

Mentions: Tiller number was 11% and 8% higher in Y-liangyou 087 than in Teyou 838 at heading and maturity, respectively (Fig 1). Pre-heading shoot biomass production was 10% lower in Y-liangyou 087 than in Teyou 838, whereas post-heading shoot biomass production was 64% higher in Y-liangyou 087 than in Teyou 838 (Table 1). Y-liangyou 087 had 5 d longer duration of pre-heading phase but similar duration of post-heading phase compared to Teyou 838. Pre-heading shoot growth rate was 17% lower in Y-liangyou 087 than in Teyou 838, while post-heading shoot growth rate was 60% higher in Y-liangyou 087 than in Teyou 838.


Root Morphology Was Improved in a Late-Stage Vigor Super Rice Cultivar.

Huang M, Chen J, Cao F, Jiang L, Zou Y - PLoS ONE (2015)

Tiller number at heading and maturity of rice cultivars Y-liangyou 087 and Teyou 838.Vertical bars represent SD (n = 6). * indicates significant difference between the two cultivars according to LSD (0.05).
© Copyright Policy
Related In: Results  -  Collection

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getmorefigures.php?uid=PMC4643960&req=5

pone.0142977.g001: Tiller number at heading and maturity of rice cultivars Y-liangyou 087 and Teyou 838.Vertical bars represent SD (n = 6). * indicates significant difference between the two cultivars according to LSD (0.05).
Mentions: Tiller number was 11% and 8% higher in Y-liangyou 087 than in Teyou 838 at heading and maturity, respectively (Fig 1). Pre-heading shoot biomass production was 10% lower in Y-liangyou 087 than in Teyou 838, whereas post-heading shoot biomass production was 64% higher in Y-liangyou 087 than in Teyou 838 (Table 1). Y-liangyou 087 had 5 d longer duration of pre-heading phase but similar duration of post-heading phase compared to Teyou 838. Pre-heading shoot growth rate was 17% lower in Y-liangyou 087 than in Teyou 838, while post-heading shoot growth rate was 60% higher in Y-liangyou 087 than in Teyou 838.

Bottom Line: This study aimed to test the hypothesis that root morphology might be improved and consequently contributing to superior post-heading shoot growth and grain yield in late-stage vigor super rice.Specific root length and length and surface area of fine roots were higher in Y-liangyou 087 than in Teyou 838 at heading and maturity by more than 15%.These results indicated that root-shoot relationships were well balanced during post-heading phase in the late-stage vigor super rice cultivar Y-liangyou 087 by improving root morphology including avoiding a too great root biomass and developing a large fine root system.

View Article: PubMed Central - PubMed

Affiliation: Collaborative Innovation Center of Grain and Oil Crops in South China, Hunan Agricultural University, Changsha, China.

ABSTRACT
This study aimed to test the hypothesis that root morphology might be improved and consequently contributing to superior post-heading shoot growth and grain yield in late-stage vigor super rice. A pot experiment was carried out to compare yield attributes, shoot growth and physiological properties and root morphological traits between a late-stage vigor super rice cultivar (Y-liangyou 087) and an elite rice cultivar (Teyou 838). Grain yield and total shoot biomass were 7-9% higher in Y-liangyou 087 than in Teyou 838. Y-liangyou 087 had 60-64% higher post-heading shoot growth rate and biomass production than Teyou 838. Average relative chlorophyll concentration and net photosynthetic rate in flag leaves were 7-11% higher in Y-liangyou 087 than in Teyou 838 during heading to 25 days after heading. Y-liangyou 087 had 41% higher post-heading shoot N uptake but 17-25% lower root biomass and root-shoot ratio at heading and maturity than Teyou 838. Specific root length and length and surface area of fine roots were higher in Y-liangyou 087 than in Teyou 838 at heading and maturity by more than 15%. These results indicated that root-shoot relationships were well balanced during post-heading phase in the late-stage vigor super rice cultivar Y-liangyou 087 by improving root morphology including avoiding a too great root biomass and developing a large fine root system.

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