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Estimation of phenotypic variability in symbiotic nitrogen fixation ability of common bean under drought stress using 15 N natural abundance in grain

View Article: PubMed Central - PubMed

ABSTRACT

New method was used to estimate symbiotic nitrogen fixation ability in bean.

Phenotypic variation in nitrogen fixation was observed under drought stress.

Four lines were superior in their ability to fix nitrogen under drought stress.

Several lines were found to combine drought resistance with ability to fix nitrogen.

Several lines were found to combine drought resistance with ability to fix nitrogen.

No MeSH data available.


Related in: MedlinePlus

Identification of genotypes that combine greater total nitrogen derived from the atmosphere in kg ha−1 estimated using grain tissue (TNdfa-G) with superior grain yield under irrigated and drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher TNdfa-G genotypes with greater grain yield were identified in the upper, right hand quadrant. Genotypes identified with symbols of (■) are commercial varieties and with a symbol of (▲) is P. acutifolius.
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fig0005: Identification of genotypes that combine greater total nitrogen derived from the atmosphere in kg ha−1 estimated using grain tissue (TNdfa-G) with superior grain yield under irrigated and drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher TNdfa-G genotypes with greater grain yield were identified in the upper, right hand quadrant. Genotypes identified with symbols of (■) are commercial varieties and with a symbol of (▲) is P. acutifolius.

Mentions: An average reduction of 70% in 2012 and 38% in 2013 in SNF ability was observed under drought stress in bush Middle American genotypes using the grain method (Table 2). The lines RCB 593, BFS 32, SER 125, SMC 141 and BFS 29 maintained a relatively higher level of SNF ability under drought stress in both years (Table 2). A weak correlation was observed between %Ndfa estimates using grain samples and grain yield under irrigated conditions (Table 1). No correlation was observed between %Ndfa estimates and grain yield under drought conditions (Table 1). However, the lines RCB 593, SEA 15, NCB 226 and BFS 29 were superior in combining high values of grain yield with greater values of %Ndfa under drought stress. The line NCB 226 was superior in %Ndfa ability under both irrigated and drought conditions (Table 2). The accumulation of N (kg ha−1) in grain was reduced by 55% due to drought stress in Middle American bush beans, being more sensitive the accumulation of total N in grain derived from the atmosphere (TNdfa-G) than N in grain derived from soil (TNdfs-G), with reduction of 78% and 43%, respectively (Fig. 1, Fig. 2). Under irrigated conditions the lines BFS 29, SCR 16, BFS 32, NCB 280 and SEN 56 presented higher total N content in grain from both TNdfs and TNdfa values compared with the other lines tested (Fig. 1, Fig. 2). Phaseolus acutifolius (G 40001) was outstanding in its ability for TNdfs, and showed a drastic decrease in TNdfa under drought (Fig. 1, Fig. 2). The lines SEA 15, RCB 593 and BFS 10 maintained higher total N content in grain for both TNdfs and TNdfa values, compared with the other lines tested under drought stress (Fig. 1, Fig. 2). The three commercial varieties (DOR 390, Tio Canela 75 and Perola) presented lower N content in grain for both TNdfs and TNdfa values under both irrigated and drought conditions (Fig. 1, Fig. 2). Similar tendency was observed in the relationship between shoot biomass and total Ndfa estimated using shoot tissue (TNdfa-SH) (Fig. 3). Genotypes that stood out for a higher TNdfa-G and grain yield under both irrigated and drought conditions (Fig. 1, Fig. 2) also exhibited higher TNdfa-SH and shoot biomass at mid-pod filling under both irrigated and drought conditions (Fig. 3). Several inbred lines were superior in their shoot biomass, grain yield and TNdfa-SH and TNdfa-G than the three commercial varieties (DOR 390, Tio Canela and Perola) under both irrigated and drought conditions (Fig. 1, Fig. 2, Fig. 3).


Estimation of phenotypic variability in symbiotic nitrogen fixation ability of common bean under drought stress using 15 N natural abundance in grain
Identification of genotypes that combine greater total nitrogen derived from the atmosphere in kg ha−1 estimated using grain tissue (TNdfa-G) with superior grain yield under irrigated and drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher TNdfa-G genotypes with greater grain yield were identified in the upper, right hand quadrant. Genotypes identified with symbols of (■) are commercial varieties and with a symbol of (▲) is P. acutifolius.
© Copyright Policy - CC BY
Related In: Results  -  Collection

License
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getmorefigures.php?uid=PMC4998141&req=5

fig0005: Identification of genotypes that combine greater total nitrogen derived from the atmosphere in kg ha−1 estimated using grain tissue (TNdfa-G) with superior grain yield under irrigated and drought conditions when grown in a Mollisol at CIAT-Palmira, Colombia. Higher TNdfa-G genotypes with greater grain yield were identified in the upper, right hand quadrant. Genotypes identified with symbols of (■) are commercial varieties and with a symbol of (▲) is P. acutifolius.
Mentions: An average reduction of 70% in 2012 and 38% in 2013 in SNF ability was observed under drought stress in bush Middle American genotypes using the grain method (Table 2). The lines RCB 593, BFS 32, SER 125, SMC 141 and BFS 29 maintained a relatively higher level of SNF ability under drought stress in both years (Table 2). A weak correlation was observed between %Ndfa estimates using grain samples and grain yield under irrigated conditions (Table 1). No correlation was observed between %Ndfa estimates and grain yield under drought conditions (Table 1). However, the lines RCB 593, SEA 15, NCB 226 and BFS 29 were superior in combining high values of grain yield with greater values of %Ndfa under drought stress. The line NCB 226 was superior in %Ndfa ability under both irrigated and drought conditions (Table 2). The accumulation of N (kg ha−1) in grain was reduced by 55% due to drought stress in Middle American bush beans, being more sensitive the accumulation of total N in grain derived from the atmosphere (TNdfa-G) than N in grain derived from soil (TNdfs-G), with reduction of 78% and 43%, respectively (Fig. 1, Fig. 2). Under irrigated conditions the lines BFS 29, SCR 16, BFS 32, NCB 280 and SEN 56 presented higher total N content in grain from both TNdfs and TNdfa values compared with the other lines tested (Fig. 1, Fig. 2). Phaseolus acutifolius (G 40001) was outstanding in its ability for TNdfs, and showed a drastic decrease in TNdfa under drought (Fig. 1, Fig. 2). The lines SEA 15, RCB 593 and BFS 10 maintained higher total N content in grain for both TNdfs and TNdfa values, compared with the other lines tested under drought stress (Fig. 1, Fig. 2). The three commercial varieties (DOR 390, Tio Canela 75 and Perola) presented lower N content in grain for both TNdfs and TNdfa values under both irrigated and drought conditions (Fig. 1, Fig. 2). Similar tendency was observed in the relationship between shoot biomass and total Ndfa estimated using shoot tissue (TNdfa-SH) (Fig. 3). Genotypes that stood out for a higher TNdfa-G and grain yield under both irrigated and drought conditions (Fig. 1, Fig. 2) also exhibited higher TNdfa-SH and shoot biomass at mid-pod filling under both irrigated and drought conditions (Fig. 3). Several inbred lines were superior in their shoot biomass, grain yield and TNdfa-SH and TNdfa-G than the three commercial varieties (DOR 390, Tio Canela and Perola) under both irrigated and drought conditions (Fig. 1, Fig. 2, Fig. 3).

View Article: PubMed Central - PubMed

ABSTRACT

New method was used to estimate symbiotic nitrogen fixation ability in bean.

Phenotypic variation in nitrogen fixation was observed under drought stress.

Four lines were superior in their ability to fix nitrogen under drought stress.

Several lines were found to combine drought resistance with ability to fix nitrogen.

Several lines were found to combine drought resistance with ability to fix nitrogen.

No MeSH data available.


Related in: MedlinePlus