Comparison of drought tolerance in nitrogen-fixing and inorganic nitrogen-grown common beans

Lodeiro, Aníbal Roberto; González, P.; Hernández, A.; Balagué, Laura Josefina; Favelukes, Gabriel

doi:10.1016/s0168-9452(99)00246-0

Cited by 76 publications

(55 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…During pod development, seeds are the major sink for C assimilates in legumes (Lodeiro et al 2000;Kumudini 2002;Nobuyasu et al 2003). Drought impairs canopy photosynthesis and restricts the supply of assimilates to the pods at this stage of development (Liu et al 2004).…”

Section: Introductionmentioning

confidence: 98%

Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

et al. 2008

View full text Add to dashboard Cite

This study investigated the factor of the physiological characteristics causing the reduction of yield of soybean plants (Glycine max (L.) Merr.) by drought stress, by monitoring changes in stem diameter and pod thickness, and photosynthetic activity, partitioning of 13 C-labeled photosynthate. Drought stress reduced the whole plant dry weight due to the decrease in leaf and pod dry matter accumulation; however, this stress did not have a significant effect on stem growth. Leaf photosynthesis was also severely decreased by drought stress in the early stage of stress treatment as leaf water potential decreased. Imposition of stress decreased pod thickness, but stem diameter increased. The adverse effect of drought stress on pod thickness was more evident at night than during the day. The stem diameter also shrank during the day and expanded at night, but the nocturnal increase in stem diameter during drought stress treatment was greater for stressed plants compared with well-watered controls. Drought stress significantly promoted 13 C partitioning from the fed leaf to other parts of the plant; the stem was the largest beneficiary. Soluble carbohydrates accumulated in various plant parts under the influence of the stress, but starch concentration declined in all organs except the stem. These results indicated that stem growth was promoted by drought stress compared to pod growth at the early grain-filling stage.

show abstract

Section: Introductionmentioning

confidence: 98%

Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

et al. 2008

View full text Add to dashboard Cite

show abstract

“…Nfya5 knockout mutants and plants overexpressing miR169 show enhanced leaf water loss and are more sensitive to drought stress, whereas NFYA5 overexpressers show the opposite phenotypes . In addition to the effects of the nitrate transporter CHL1 (Guo et al, 2003) or nitrate reductasemediated nitric oxide generation (Desikan et al, 2002) on stomatal opening, low expression of miR169 during N limitation could thus contribute to drought tolerance of N-limited plants (Lodeiro et al, 2000;Castaings et al, 2008).…”

Section: Potential Biological Impact Of Mir169 Regulation By N Availamentioning

confidence: 99%

Identification of Nutrient-Responsive Arabidopsis and Rapeseed MicroRNAs by Comprehensive Real-Time Polymerase Chain Reaction Profiling and Small RNA Sequencing

et al. 2009

View full text Add to dashboard Cite

Comprehensive expression profiles of Arabidopsis (Arabidopsis thaliana) MIRNA genes and mature microRNAs (miRs) are currently not available. We established a quantitative real-time polymerase chain reaction platform that allows rapid and sensitive quantification of 177 Arabidopsis primary miR transcripts (pri-miRs). The platform was used to detect phosphorus (P) or nitrogen (N) status-responsive pri-miR species. Several pri-miR169 species as well as pri-miR398a were found to be repressed during N limitation, whereas during P limitation, pri-miR778, pri-miR827, and pri-miR399 species were induced and pri-miR398a was repressed. The corresponding responses of the biologically active, mature miRs were confirmed using specific stem-loop reverse transcription primer quantitative polymerase chain reaction assays and small RNA sequencing. Interestingly, the latter approach also revealed high abundance of some miR star strands. Bioinformatic analysis of small RNA sequences with a modified miRDeep algorithm led to the identification of the novel P limitation-induced miR2111, which is encoded by two loci in the Arabidopsis genome. Furthermore, miR2111, miR169, a miR827-like sequence, and the abundances of several miR star strands were found to be strongly dependent on P or N status in rapeseed (Brassica napus) phloem sap, flagging them as candidate systemic signals. Taken together, these results reveal the existence of complex small RNA-based regulatory networks mediating plant adaptation to mineral nutrient availability.

show abstract

“…The lack of adequate moisture leading to water stress is a common occurrence in rainfed areas, brought about by infrequent rains and poor irrigation (Wang et al 2005). Common bean appears to be particularly sensitive to this stress (Kirda et al 1989) with considerable reduction in N 2 fixation (Figueiredo et al 1999;Zahran 1999;Lodeiro et al 2000) as a consequence of changes in nitrogenase activity and nodule biomass (Gonzàlez et al 1998). Regardless the physiological mechanism of N 2 fixation inhibition by drought stress, there is evidence that legume species have significant genetic variation in their ability to fix N 2 under drought conditions, e.g.…”

Section: Introductionmentioning

confidence: 96%

Osmotic stress affects water relations, growth, and nitrogen fixation in Phaseolus vulgaris plants

Aydi

González

et al. 2008

Acta Physiol Plant

View full text Add to dashboard Cite

The effects of mannitol-mediated osmotic stress on water relations, plant growth and symbiotic N 2 -fixation in four common bean (Phaseolus vulgaris) lines (Coco Blanc, BAT 477, BRB 77 and Flamingo) were studied. After germination, seedlings were inoculated with a reference strain (Rhizobium tropici CIAT 899) and aerohydroponically grown in a glasshouse. Osmotic stress was applied by 50 mM mannitol. Plants were harvested 4 weeks after osmotic stress application. Measured parameters were plant water relations, growth, nodule development, and symbiotic N 2 -fixation (SNF) as well as leghemoglobin contents. Osmotic stress induced significant changes in water relations, growth and symbiotic N 2 -fixation in stressed plants compared to control ones in all lines studied. A noticeable different behaviour was observed in the end of the treatment: Flamingo was the most tolerant line, whereas Coco blanc was the most sensitive, the two other lines exhibited an intermediate behaviour. The four bean lines displayed significant differences in their responses to osmotic stress. This study indicated that the relative tolerance of Flamingo line seems to be due to its ability to maintain higher leaf water potential, adequate leaf area and abundant and efficient nodular system, which in turn determines an important rate of SNF.

show abstract

Comparison of drought tolerance in nitrogen-fixing and inorganic nitrogen-grown common beans

Cited by 76 publications

References 36 publications

Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

Differences in the responses of stem diameter and pod thickness to drought stress during the grain filling stage in soybean plants

Identification of Nutrient-Responsive Arabidopsis and Rapeseed MicroRNAs by Comprehensive Real-Time Polymerase Chain Reaction Profiling and Small RNA Sequencing

Osmotic stress affects water relations, growth, and nitrogen fixation in Phaseolus vulgaris plants

Contact Info

Product

Resources

About