Root and shoot traits for rice varieties with higher grain yield and higher nitrogen use efficiency at lower nitrogen rates application

Ju, Chengxin; Buresh, R. J.; Wang, Zhiqin; Zhang, Hao; Liu, Lijun; Yang, Jianchang; Zhang, Jianhua

doi:10.1016/j.fcr.2015.02.007

Cited by 278 publications

(187 citation statements)

References 36 publications

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“…Recently it has been observed that there is a large difference in NUE among newly bred super rice cultivars [23] . Two super rice cultivars, Huaidao 5 and Lianjing 7, produced higher grain yield, absorbed higher amounts of N from the soil, and exhibited higher NUE than other super rice cultivars at lower N rates (0, 100 or 200 kg$hm -2 ).…”

Section: Introductionmentioning

confidence: 99%

Approaches to achieve high grain yield and high resource use efficiency in rice

Yang¹

2015

Front. Agr. Sci. Eng.

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This article discusses approaches to simultaneously increase grain yield and resource use efficiency in rice. Breeding nitrogen efficient cultivars without sacrificing rice yield potential, improving grain fill in laterflowering inferior spikelets and enhancing harvest index are three important approaches to achieving the dual goal of high grain yield and high resource use efficiency. Deeper root distribution and higher leaf photosynthetic N use efficiency at lower N rates could be used as selection criteria to develop N-efficient cultivars. Enhancing sink activity through increasing sugar-spikelet ratio at the heading time and enhancing the conversion efficiency from sucrose to starch though increasing the ratio of abscisic acid to ethylene in grains during grain fill could effectively improve grain fill in inferior spikelets. Several practices, such as post-anthesis controlled soil drying, an alternate wetting and moderate soil drying regime during the whole growing season, and non-flooded straw mulching cultivation, could substantially increase grain yield and water use efficiency, mainly via enhanced remobilization of stored carbon from vegetative tissues to grains and improved harvest index. Further research is needed to understand synergistic interaction between water and N on crop and soil and the mechanism underlying high resource use efficiency in high-yielding rice.

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Section: Introductionmentioning

confidence: 99%

Approaches to achieve high grain yield and high resource use efficiency in rice

Yang¹

2015

Front. Agr. Sci. Eng.

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“…These differences may arise from the different light quality, light intensity and plant species. The higher rice grain yield in RBG 25 relative to CK may be ascribed to the increased root to shoot ratio and the root respiration activity at the seedling stage (Figure 3), which can improve shoot growth by supplying a sufficient amount of nutrients, water and phytohormones to shoots, and subsequently ensure an increase in rice productivity (Ju et al 2015). Therefore, it is concluded that the effect of lighting treatments on root systems at the seedling stage may affect the later stages of grain development of rice.…”

Section: Discussionmentioning

confidence: 99%

Rice yield corresponding to the seedling growth under supplemental green light in mixed light-emitting diodes

Zhang¹,

Huang²,

Xiao³

et al. 2016

Plant Soil Environ.

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“…Hal yang sama diperoleh Babu et al (2001) (Fukai & Cooper 1995). Bobot akar dan tajuk tanaman padi yang tinggi, terutama yang memiliki perakaran dalam dapat dijadikan sebagai kriteria seleksi dalam pemuliaan padi untuk menghasilkan varietas yang efisien dalam penggunaan pupuk N (Ganapathy et al 2010;Ju et al 2015). Gen DEEPER ROOTING 1 (DRO1) mengendalikan perakaran padi yang tumbuh ke arah bawah terlibat dalam perpanjangan sel pada ujung akar, yang menghasilkan perakaran yang lebih dalam untuk menghindari kekeringan.…”

Section: Hasil Dan Pembahasan Deskripsi Karakter Perakaran Plasma Nutunclassified

Evaluasi Plasma Nutfah Padi Gogo Berdasarkan Karakter Kuantitatif Perakaran Tanaman

Andarini¹,

Afza²,

Herlina³

et al. 2018

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Generally, upland rice productivity is lower than irrigated rice due to physical characteristic, water land limitation, and rooting characteristic. Upland rice variety which could be adaptive towards marginal land environment can be achieved through plant breeding. This study aimed to evaluate rooting system of upland rice germplasm through its rooting ability to penetrate into hard coating and to measure rooting which expected to related with its adaptability towards dry environment and soil density. This study was implemented in ICABIOGRAD's glass house, Bogor during July-August 2015. A hundred of local varieties of germplasm seeds originated from North Sumatra, South Sumatra, North Sulawesi, Jambi, Central Kalimantan, East Kalimantan, NTT, Central Java, East Java, West Java, DIY, and Banten provinces were planted inside pot with basic materials were coated with mix combination of 60% paraffin and 40% vaseline which equal with 12 bars of strength. The results showed grouping of 100 variety upand rice germplasms could be devided based on variety with unsimilar charachteristic with others variety, which were Si Gambiri Etek from North Sumatra, Cikapudeng variety from Banten, and Ketan Kasumba B variety from Banten. Germplasm with the best rooting characteristic (roots weight and high root canopy ratio) can be used as genetic resources for plant breeding program.Keywords: upland rice, rooting penetration, germplasm. ABSTRAKProduktivitas padi gogo umumnya lebih rendah dibanding dengan padi sawah disebabkan oleh sifat fisik dan terbatasnya air dalam tanah serta karakteristik perakaran tanaman. Varietas padi gogo yang adaptif pada lingkungan lahan marginal dapat diperoleh melalui pemuliaan tanaman. Tujuan penelitian ini adalah mengevaluasi sistem perakaran plasma nutfah padi gogo melalui kemampuan perakarannya menembus lapisan keras dan untuk mengukur perakaran yang diduga berkaitan dengan adaptabilitasnya terhadap lingkungan kekeringan dan kepadatan tanah. Penelitian dilakukan di rumah kaca BB Biogen Bogor pada bulan JuliAgustus 2015. Benih plasma nutfah 100 aksesi (varietas lokal) yang berasal dari provinsi Sumatra Utara, Sumatra Selatan, Sulawesi Utara, Jambi, Kalimantan Tengah, Kalimantan Timur, NTT, Jawa Tengah, Jawa Timur, Jawa Barat, DIY, dan Banten ditanam pada pot dengan bagian dasar dilapisi dengan kombinasi campuran 60% parafin dan 40% vaselin yang setara dengan kekerasan 12 bar. Hasil penelitian menunjukkan pengelompokan plasma nutfah 100 varietas padi gogo dapat dikelompokkan berdasarkan varietas yang karakteristiknya jauh berbeda dengan yang lain, yaitu varietas Si Gambiri Etek asal Sumatra Utara, varietas Cikapundeng asal Banten, dan varietas Ketan Kasumba B asal Banten. Plasma nutfah yang memiliki karakteristik perakaran baik (bobot akar dan rasio akar tajuk yang tinggi) dapat digunakan sebagai tetua dalam program pemuliaan tanaman.

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Root and shoot traits for rice varieties with higher grain yield and higher nitrogen use efficiency at lower nitrogen rates application

Cited by 278 publications

References 36 publications

Approaches to achieve high grain yield and high resource use efficiency in rice

Approaches to achieve high grain yield and high resource use efficiency in rice

Rice yield corresponding to the seedling growth under supplemental green light in mixed light-emitting diodes

Evaluasi Plasma Nutfah Padi Gogo Berdasarkan Karakter Kuantitatif Perakaran Tanaman

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