Rooting traits of peanut genotypes with different yield responses to terminal drought

et al. 2014

Chilean J. Agric. Res.

Drought at pod filling reduces growth, yield, and seed quality of peanut (Arachis hypogaea L.) Great root system can reduce yield loss under water stress. There is a lack of information on root traits for peanut genotypes and the relationship between rooting traits and peanut yield under terminal drought. The pot experiments were conducted at Khon Kaen University, Thailand, in 2004Thailand, in -2005Thailand, in and 2005Thailand, in -2006. A randomized complete block design was used with two factorials set-up with four replicates. Factor A consisted of two water regimes (field capacity and 1/3 available water at 80 d after planting to harvest), and factor B comprised of 11 peanut genotypes. Data were recorded for root traits (root dry weight, root length, root surface, root diameter, and root volume), and peanut yield (pod dry weight, biomass, and harvest index) were measured at final harvest. Terminal drought significantly decrease root characteristics (0.83-1.03 g plant -1 of root dry weight) and peanut yield (7.98-8.89 g plant -1 of pod dry weight). Yield responses to terminal drought were not correlated with root traits except root length and root volume (r = 0.71** and 0.83**, respectively). Some genotype, root traits seem to be correlated with peanut yield under terminal drought. 'KK60-3' showed high root traits, maintained pod dry weight under terminal drought, whereas Tifton 8 maintained biomass production. ICGV98348 had high root traits, maintained pod dry weight and harvest index under drought conditions. The results suggested that peanut contained high root characters which maintained yield under terminal drought.

Section: Discussionmentioning

confidence: 67%

Response of root characteristics and yield in peanut under terminal drought condition

Junjittakarn

Girdthai

et al. 2014

Chilean J. Agric. Res.

“…Koolachart et al (2013) showed that terminal drought caused 38%-42% yield reduction. ICGV 98324 and ICGV 98348 showed the highest PY under stress conditions.…”

Section: Discussionmentioning

confidence: 99%

“…Drought conditions were defined as one-third of the available water (1/3 AW) of soil moisture, or terminal drought (Girdthai et al, 2010). Normal practices were performed to control weeds, diseases, and insects (Koolachart et al, 2013).…”

Section: Experimental Design and Plant Materialsmentioning

confidence: 99%

Nutrient uptakes and their contributions to yield in peanut genotypes with different levels of terminal drought resistance

Htoon¹,

Vorasoot³

et al. 2014

Turk J Agric For

Different peanut yields under terminal drought might be due to the different nutrient uptakes among peanut genotypes. Nutrient uptake was presumed to be a drought-resistant trait and might involve drought tolerance mechanisms. The aims of this study, therefore, were to characterize the effect of terminal drought on peanut nutrient uptake and to investigate the genotypic variability of nutrient uptake and its interactions with terminal drought. Field experiments were conducted at the Field Crop

“…Direct comparison of root dry weight among the results of different studies is not possible because different methods were used for quantifying root dry weight. The previous studies used monolith method (Jongrungklang et al., ; Koolachart et al., ), whereas this study used rhizobox method, and the results are expected to be different. Jongrungklang et al.…”

Section: Discussionmentioning

confidence: 82%

“…The absence of suitable technologies to define root architecture accurately under field conditions is a major obstacle to the genetic improvement of root traits associated with drought tolerance. Many studies have investigated root growth using an auger method (Jongrungklang et al., ; Koolachart et al., ; Songsri et al., ). By studying root growth characteristics in a rhizobox with a needle board, the root growth patterns and morphology are more easily defined (Thangthong, Jogloy, Pensuk, Kesmala, & Vorasoot, ) and allow researchers to compare and contrast different genetic material.…”

Section: Discussionmentioning

confidence: 99%

Root distribution patterns of peanut genotypes with different drought resistance levels under early‐season drought stress

Thangthong

J Agronomy Crop Science

Jongrungklang

et al. 2017

Self Cite

Drought severely limits crop yield of peanut. Yet cultivars with enhanced root development enable the exploration of a greater volume of soil for water and nutrients, helping the plant survive. Root distribution patterns of three genotypes (ICGV 98305, ICGV 98324 and Tifton‐8) were compared when grown in well‐watered rhizoboxes and when grown in rhizoboxes where an early‐season drought was imposed using rain‐exclusion shelters. The treatments were arranged in a completely randomized design with three replications, and the experiment was conducted during two seasons at the Field Crop Research Station of Khon Kaen University, in Khon Kaen, Thailand. The root system of ICGV 98305, when grown under drought, had a significantly higher root length in the 30–110 cm deep soil layers and less roots in the 0–30 cm soil layers when under drought than when grown under well‐watered conditions. Roots of Tifton‐8 had the largest reductions in root length in upper soil layer and reduced in most soil layers. Tifton‐8 grown under drought was smaller than under well‐watered control for all root traits, showing negative response to drought. The peanut genotypes with high root traits in deeper soil layer under early‐season drought might contribute to drought avoidance mechanism.