Photosynthetic response and nitrogen use efficiency of sugarcane under drought stress conditions with different nitrogen application levels

Hoang, Dinh Thai; Watanabe, Kayo; Takaragawa, Hiroo; Nakabaru, Mai

doi:10.1080/1343943x.2017.1371570

Cited by 77 publications

(48 citation statements)

References 32 publications

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“…Extension of the drought period over weeks helps to identify mutant clones with enhanced tolerance traits, due to physiological changes that occur in plants in order to accommodate the stress. In previous findings, a negative correlation has been found between drought and drought-related physiological parameters (i.e., efficiency of photosynthetic system II, photosynthetic rate, and chlorophyll content) depending upon various plant developmental stages and the duration of drought stress by various researchers [27,34,38,39]. In our study, significant reductions in all these parameters have also been noted, with the increase in drought stress.…”

Section: Discussionsupporting

confidence: 76%

Screening of EMS-Induced Drought-Tolerant Sugarcane Mutants Employing Physiological, Molecular and Enzymatic Approaches

et al. 2018

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Drought stress is one of the major agronomic concerns that lead towards a sharp decline in sugarcane yield. An urgent demand to overcome drought is critical to ensure sugarcane production. Mutation breeding is one of the promising tools available to produce stress-resistant plants, with the induction of new alleles due to point mutation within existing sugarcane germplasm. The current study was directed to chemically mutagenize the calli of two sugarcane cultivars (ROC22 and FN39) via 0.1% EMS, with focus on inducing mutations in their genome. The 1644 regenerated plants of ROC22 and 1398 of FN39 were exposed to 28% PEG-6000 stimulated osmotic stress. Eighteen plants of ROC22 and 2 plants of FN39, that survived after in vitro osmotic stress treatment, were then subjected to preliminary greenhouse pot trials to confirm drought tolerance by analyzing them using various physiological parameters, including photosystem II (PSII) photochemical efficiency (Fv/Fm), leaf chlorophyll content, and photosynthetic rate. The genetic diversity among drought-resistant mutant lines was further assessed by 15 pairs of simple sequence repeat (SSR) markers amplification and CEL (Celery) I endonuclease digestion, to investigate the mutated sites. Mutant lines of ROC22 (i.e., MR22-15 and MR22-20) were found to be promising for future drought resistance breeding, due to better physiological adaptation under drought stress.

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Section: Discussionsupporting

confidence: 76%

Screening of EMS-Induced Drought-Tolerant Sugarcane Mutants Employing Physiological, Molecular and Enzymatic Approaches

et al. 2018

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“…According to a previous experimental method (Dinh et al, 2017), SPAD values was estimated with a SPAD-502 Plus (Konica Minolta Sensing, Inc., Osaka, Japan). After photosynthesis measurements, SPAD values were recorded at the same position.…”

Section: Methodsmentioning

confidence: 99%

The Physiological and Agronomic Responses to Nitrogen Dosage in Different Sugarcane Varieties

et al. 2019

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Nitrogen (N) is very important for sugarcane yield improvement, but the excessive application of N fertilizer brings about N pollution and a cost increase. Through distinguishing the difference of nitrogen use efficiency (NUE), we can reasonably apply N fertilizer according to the NUE characteristics of sugarcane varieties, and thus reduce N loss and maintain high yield. The present study showed the pot experiment results of identifying NUE types of nine main sugarcane varieties in the main sugarcane producing areas of China under controlled conditions, and identified the key physiological and agronomic indictors which can help to determine the NUE types of sugarcane. The test clones were exposed to varying levels of N fertilizer and 15 parameters that are likely to impact NUE were measured. The key results are (1) Sugarcane variety ROC22 has the high plant dry weight (PDW) and NUE among nine varieties under different N rates, it can take advantages under low N supply (225 kg/hm 2 urea), and less N fertilizer can be applied properly in production. (2) Varieties of GT32 was good performing genotype for PDW and NUE under low N supply (225 kg/hm 2 urea), GT42 was more suitable for moderate N environment (450 kg/hm 2 urea), while YT94-128 was at middle N and high N supply (450–675 kg/hm 2 urea). (3) Late stage of shoot elongation is suitable for differentiating sugarcane clones for NUE. (4) Leaf glutamine synthetase activity is the most reliable predictor of NUE in sugarcane. The result of pot experiment is sufficient to differentiate clonal variation for NUE in sugarcane as it reflects field experimental results. This study can set up a basis for identification the NUE types of sugarcane varieties and the development of reasonable N fertilizer application.

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“…Stres air lebih sering terjadi pada awal pertumbuhan yaitu pada fase pembentukan anakan. Dengan demikian, fase ktitis tanaman tebu terhadap ketersediaan air (kekeringan) pada periode penanaman awal musim kemarau adalah fase pembentukan anakan (Dinh et al, 2017).…”

Section: Hasil Dan Pembahasanunclassified

“…Tanaman dengan tingkat ketahanan terhadap kekeringan tergolong sangat rentan, rentan dan moderat umumnya mempunyai bobot akar (28,28-37,81 g/tanaman) dan bagian atas tanaman (100,55-121,91 g/tanaman) yang relatif rendah dengan kisaran nisbah 0,26-0,37. (Dinh et al, 2017) menekankan sistem perakaran yang tinggi pada fase awal pertumbuhan akan membantu penyerapan nutrisi yang lebih baik untuk membentuk bagian atas tanaman pada kondisi air tanah optimal dan stres.…”

Section: Hasil Dan Pembahasanunclassified

Uji Ketahanan Klon-klon Harapan Tebu terhadap Kekeringan

Riajaya¹,

Djumali²,

Heliyanto³

2020

Bul. Tan. Tembakau, Serat & Minyak Industri

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Pengembangan tebu di lahan kering harus didukung oleh ketersediaan varietas tebu tahan kering dan rendemen yang tinggi. Penelitian bertujuan untuk mengetahui tingkat ketahanan klon-klon harapan tebu terhadap kekeringan, dilaksanakan di rumah kaca menggunakan benih budchip yang ditanam di dalam pot mulai Juni sampai Desember 2018. Perlakuan disusun dalam Rancangan Petak Terbagi dengan tiga ulangan. Petak utama terdiri dari tiga perlakuan kekeringan, yaitu kadar air tanah (KAT) tersedia dipertahankan 40% (kisaran 38-43%), 70% (68-73%) dan 100% (95-100%) mulai tanaman berumur 1-4 bulan setelah tanam. Anak petak terdiri dari 13 klon harapan tebu yang mempunyai tipe kemasakan awal-awal tengah dan satu varietas pembanding (PS 881). Hasil penelitian menunjukkan tingkat ketahanan klon-klon harapan tebu sangat rentan sampai sangat toleran terhadap kekeringan. Sebanyak sembilan klon dengan tingkat ketahanan terhadap kekeringan lebih baik dibanding varietas pembanding PS 881 (rentan) yaitu MLG 26, MLG 12, MLG 55, dan MLG 11 (moderat), MLG 24 (toleran), MLG 9, MLG 14, MLG 4, dan MLG 49 (sangat toleran). Terdapat tiga klon dengan tingkat ketahanan terhadap kekeringan sama dengan varietas pembanding, yaitu MLG 38, MLG 5, dan MLG 52 (rentan), serta satu klon (MLG 56) tergolong sangat rentan. Kata kunci: tebu, ketahanan terhadap kekeringan, klon harapan

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Photosynthetic response and nitrogen use efficiency of sugarcane under drought stress conditions with different nitrogen application levels

Cited by 77 publications

References 32 publications

Screening of EMS-Induced Drought-Tolerant Sugarcane Mutants Employing Physiological, Molecular and Enzymatic Approaches

Screening of EMS-Induced Drought-Tolerant Sugarcane Mutants Employing Physiological, Molecular and Enzymatic Approaches

The Physiological and Agronomic Responses to Nitrogen Dosage in Different Sugarcane Varieties

Uji Ketahanan Klon-klon Harapan Tebu terhadap Kekeringan

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