System responses to long‐term drought and re‐watering of two contrasting alfalfa varieties

Kang, Yun Hwan; Han, Yuanhong; Torres‐Jerez, Ivone; Wang, Mingyi; Tang, Yuhong; Monteros, María J.; Udvardi, Michael K.

doi:10.1111/j.1365-313x.2011.04738.x

Cited by 127 publications

(141 citation statements)

References 121 publications

(224 reference statements)

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“…Means within columns and treatments followed by different letters are significantly different at p < 0.05 according to Tukey's HSD test a Analysis excluded BWS^or BWS^and BREC^treatments as no plants were considered viable both a higher leaf RWC and shoot biomass than other cultivars during water deficit (Kang et al 2011). Belle transpired more water than Altaswede during the threeweek dry down period where soil dried from 80% to 15% RSWC and during the subsequent 4 and 8 day no watering periods (Fig.…”

Section: Wsmentioning

confidence: 99%

Genotypic differences in red clover (Trifolium pratense L.) response under severe water deficit

et al. 2018

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Aims In Ontario, Canada, acreage of red clover (Trifolium pratense L.) intercropped with winter wheat (Triticum aestivum L. em. Thell) has declined, despite well-documented soil and yield benefits. The decline has resulted from increasing prevalence of stand nonuniformity, which has been attributed in part to soil moisture deficits. We examined whether there are genotypic differences in drought response between red clover varieties. Methods A double-cut (Belle) and a single-cut variety (Altaswede) were grown under four different durations of drought (4, 8, 12 and 16 days below 15% relative soil water content, RSWC). Shoot dry weight, shoot relative water content (RWC), leaf area and crown water content were measured in control, drought and drought + recovery treatments. Results Belle used significantly more water during soil moisture deficit and had greater leaf area, shoot dry weight and RWC compared to Altaswede. In contrast, Altaswede had significantly higher survival rates than Belle, attributed to maintenance of meristematic tissue viability in the crown where re-growth, after shoot tissue desiccation, can occur. Conclusions By demonstrating genotypic variation in survival strategies of red clover, traits can be identified for the development of improved varieties. Varieties with higher survival rates during drought will result in more uniform stands and increased utilization of red clover for environmental and yield benefits.

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Section: Wsmentioning

confidence: 99%

Genotypic differences in red clover (Trifolium pratense L.) response under severe water deficit

et al. 2018

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“…Moreover, a decline in the activities of nitrate reductase (NR) and glutamine synthetase (GS) was observed under drought (Xu and Zhou 2006). Although recent studies refer to a more detailed characterization of C and N metabolism (Aranjuelo et al 2011;Kang et al 2011), changes in key enzyme activities and metabolites involved in C and N metabolism induced by drought are still being debated due to plant species (Sánchez-Rodríguez et al 2011), stress intensity, and duration Zhou 2006, 2007). Many metabolites are believed simply to accumulate under drought conditions (Muller et al 2011), and metabolite patterns remain unclear.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

Liu

Wang

Pan

et al. 2015

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Key message Differential regulations of C and N metabolism in dwarf bamboo improve the capacity of osmotic adjustment, and also their metabolites may play an important role for protection against membrane lipid peroxidation under drought, thus accelerating recovery after rewatering. Abstract Dwarf bamboo (Fargesia rufa Yi), is a staple food for the endangered giant panda, but little is known about the impact of drought on bamboo species and its recovery mechanism. This study investigated the response of carbon (C) and nitrogen (N) metabolism to drought and subsequent recovery, and the relationship of their metabolites with lipid peroxidation. Photochemistry was reversibly down-regulated after drought, but a longer recovery time is needed. The accelerated degradation of starch due to a rapid increase in amylase activity resulted in higher soluble sugar only in severe drought-stressed plants after 30 days of drought. Sucrose content was not affected by drought because of the relative increases in activities of invertase, sucrose synthase, and sucrose phosphate synthase. As nitrate concentration increased in parallel with nitrate reductase activity, ammonium (NH 4 ? ) production was enhanced by drought. Also, activated glutamine synthetase/glutamate synthase cycle stimulated NH 4? assimilation, while hydrolysis of soluble proteins was accelerated, resulting in accumulation of amino acids. After rewatering, re-balancing of C metabolism has gradually begun, but a stronger N metabolism was still observed. The notable positive correlations between MDA and the contents of starch and proline after 15 days of drought as well as between MDA and the contents of soluble sugar, NSC and proline after 30 days of drought were displayed. We conclude that dwarf bamboo may not only differently regulate its C and N metabolism to improve the capacity of osmotic adjustment but also employ its different metabolites protect against membrane Communicated by M. Adams.

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“…In leaves of red clover, the concentration of d-pinitol ranged from 14 to 20 mg g −1 DW under optimal water conditions, and up to 110-120 mg g −1 DW under drought stress (Yates et al 2014). An increase in the d-pinitol concentration under drought stress was also found in soybean (Streeter et al 2001), Cicer arietinum (Matos et al 2010), alfalfa (Kang et al 2011) and Medicago truncatula (Zhang et al 2017). In our study, fenugreek plants grew under suitable watering conditions.…”

Section: Discussionmentioning

confidence: 63%

The occurrence and accumulation of d-pinitol in fenugreek (Trigonella foenum graecum L.)

et al. 2018

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This article presents changes in concentrations of d-pinitol (and other cyclitols as well as low molecular weight carbohydrates) in vegetative and reproductive organs of fenugreek (Trigonella foenumgraecum L.) during an entire plant growing period. d-Pinitol was the major cyclitol in all tested organs, representing 43-94% of total cyclitols and 2-77% of total soluble carbohydrates. The highest concentration of d-pinitol was found in pods (14-23 mg g −1 of dry weight, DW), lower in leaves and stems (5-20 and 9-10 mg g −1 DW, respectively), and the lowest in maturing seeds (2-5 mg g −1 DW). Although maturing seeds accumulate α-d-galactosides of d-pinitol (galactosyl pinitols, up to 6.6 mg g −1 DW), the major storage sugars were raffinose family oligosaccharides (RFOs, 65.37 mg g −1 DW). Both RFOs and galactosyl pinitols are hydrolyzed during seed germination, releasing sucrose and d-pinitol, respectively. Accumulation of free galactose was not detected. Owing to the high concentration of d-pinitol (up to 23.70 mg g −1 DW) and low concentration of soluble sugars, developing pods seem to be the best source of d-pinitol.

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System responses to long‐term drought and re‐watering of two contrasting alfalfa varieties

Cited by 127 publications

References 121 publications

Genotypic differences in red clover (Trifolium pratense L.) response under severe water deficit

Genotypic differences in red clover (Trifolium pratense L.) response under severe water deficit

Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

The occurrence and accumulation of d-pinitol in fenugreek (Trigonella foenum graecum L.)

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