Ecophysiological responses of Caragana korshinskii Kom. under extreme drought stress: Leaf abscission and stem survives

Xu, Danghui; Fang, Xiang‐Wen; Su, P. X.; Wang, Gan

doi:10.1007/s11099-012-0060-4

Cited by 16 publications

(9 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several stresses can lead cell death and leaf abscission in plants, like drought [ 61 , 62 ] and salt [ 63 ] stresses. Hence, we analyzed the transcripts involved in the response to stresses.…”

Section: Resultsmentioning

confidence: 99%

De novo analysis of transcriptome reveals genes associated with leaf abscission in sugarcane (Saccharum officinarum L.)

Liang

Zeng

et al. 2016

BMC Genomics

View full text Add to dashboard Cite

BackgroundSugarcane (Saccharum officinarum L.) is an important sugar crop which belongs to the grass family and can be used for fuel ethanol production. The growing demands for sugar and biofuel is asking for breeding a sugarcane variety that can shed their leaves during the maturity time due to the increasing cost on sugarcane harvest.ResultsTo determine leaf abscission related genes in sugarcane, we generated 524,328,950 paired reads with RNA-Seq and profiled the transcriptome of new born leaves of leaf abscission sugarcane varieties (Q1 and T) and leaf packaging sugarcane varieties (Q2 and B). Initially, 275,018 transcripts were assembled with N50 of 1,177 bp. Next, the transcriptome was annotated by mapping them to NR, UniProtKB/Swiss-Prot, Gene Ontology and KEGG pathway databases. Further, we used TransDecoder and Trinotate to obtain the likely proteins and annotate them in terms of known proteins, protein domains, signal peptides, transmembrane regions and rRNA transcripts. Different expression analysis showed 1,202 transcripts were up regulated in leaf abscission sugarcane varieties, relatively to the leaf packaging sugarcane varieties. Functional analysis told us 62, 38 and 10 upregulated transcripts were involved in plant-pathogen interaction, response to stress and abscisic acid associated pathways, respectively. The upregulation of transcripts encoding 4 disease resistance proteins (RPM1, RPP13, RGA2, and RGA4), 6 ABC transporter G family members and 16 transcription factors including WRK33 and heat stress transcription factors indicate they may be used as candidate genes for sugarcane breeding. The expression levels of transcripts were validated by qRT-PCR. In addition, we characterized 3,722 SNPs between leaf abscission and leaf packaging sugarcane plants.ConclusionOur results showed leaf abscission associated genes in sugarcane during the maturity period. The output of this study provides a valuable resource for future genetic and genomic studies in sugarcane.Electronic supplementary materialThe online version of this article (doi:10.1186/s12864-016-2552-2) contains supplementary material, which is available to authorized users.

show abstract

Section: Resultsmentioning

confidence: 99%

De novo analysis of transcriptome reveals genes associated with leaf abscission in sugarcane (Saccharum officinarum L.)

Liang

Zeng

et al. 2016

BMC Genomics

View full text Add to dashboard Cite

show abstract

“…This phenomenon suggests that plant conducting tissue becomes more developed under reduced precipitation 44 . Recent research has shown that C. korshinskii can accumulate more carbohydrates in its stems and branches in response to extreme drought stress, and such changes are necessary for new leaves to re-sprout and re-grow 45 .…”

Section: Discussionmentioning

confidence: 99%

Carbon Storage Patterns of Caragana korshinskii in Areas of Reduced Environmental Moisture on the Loess Plateau, China

Gong

Bai

Wang

et al. 2016

Sci Rep

View full text Add to dashboard Cite

Precipitation patterns are influenced by climate change and profoundly alter the carbon sequestration potential of ecosystems. Carbon uptake by shrubbery alone accounts for approximately one-third of the total carbon sink; however, whether such uptake is altered by reduced precipitation is unclear. In this study, five experimental sites characterised by gradual reductions in precipitation from south to north across the Loess Plateau were used to evaluate the Caragana korshinskii’s functional and physiological features, particularly its carbon fixation capacity, as well as the relationships among these features. We found the improved net CO2 assimilation rates and inhibited transpiration at the north leaf were caused by lower canopy stomatal conductance, which enhanced the instantaneous water use efficiency and promoted plant biomass as well as carbon accumulation. Regional-scale precipitation reductions over a certain range triggered a distinct increase in the shrub’s organic carbon storage with an inevitable decrease in the soil’s organic carbon storage. Our results confirm C. korshinskii is the optimal dominant species for the reconstruction of fragile dryland ecosystems. The patterns of organic carbon storage associated with this shrub occurred mostly in the soil at wetter sites, and in the branches and leaves at drier sites across the arid and semi-arid region.

show abstract

“…S. psammophila is important to the energy and paper industries, whereas C. korshinskii is economically important as a highly productive forage shrub. Effects of the short-term drought on seedling water relations and photosynthesis on these two species have been studied (Liu et al, 2007;Xu et al, 2012), but little is known about the responses of mature plants to the long-term drought and varied precipitation. Thus, we conducted a manipulated experiment with three levels of precipitation (a control with ambient precipitation, 50% above ambient precipitation (irrigation treatment), and 50% below ambient precipitation (drought treatment)) on these two shrubs to address the following three questions: (1) are A n and g s higher in C. korshinskii than in S. psammophila under severe drought due to the anisohydric behavior of C. korshinskii and isohydric behavior of S. psammophila (Li et al, 2016)?…”

Section: Introductionmentioning

confidence: 99%

“…(2) does the shallow-rooted S. psammophila respond more strongly than C. korshinskii to the higher precipitation, and is it severely inhibited under drought treatment? and (3) xeric species photosynthetically acclimate to the long-term drought better than riparian species (Martin-StPaul et al, 2012;Zhou et al, 2016), so does the drought-resistant C. korshinskii (Ma et al, 2008;Xu et al, 2012) photosynthetically acclimate better than the drought-vulnerable S. psammophila?…”

Section: Introductionmentioning

confidence: 99%

Responses of leaf water potential and gas exchange to the precipitation manipulation in two shrubs on the Chinese Loess Plateau

Chen

et al. 2020

J. Arid Land

View full text Add to dashboard Cite

Regulation of leaf gas exchange plays an important role in the survival of trees and shrubs under future climate change. However, the responses of leaf water potential and gas exchange of shrubs in semi-arid areas to the precipitation alteration are not clear. Here, we conducted a manipulated experiment with three levels of precipitation, i.e., a control with ambient precipitation, 50% above ambient precipitation (irrigation treatment), and 50% below ambient precipitation (drought treatment), with two common shrubs, Salix psammophila C. Wang & C. Y. Yang (isohydric plant, maintaining a constant leaf water potential by stomatal regulation) and Caragana korshinskii Kom. (anisohydric plant, having more variable leaf water potential), on the Chinese Loess Plateau in 2014 and 2015. We measured the seasonal variations of predawn and midday leaf water potential (Ψ pd and Ψ md ), two parameters of gas exchange, i.e., light-saturated assimilation (A n ) and stomatal conductance (g s ), and other foliar and canopy traits. The isohydric S. psammophila had a similar A n and a higher g s than the anisohydric C. korshinskii under drought treatment in 2015, inconsistent with the view that photosynthetic capacity of anisohydric plants is higher than isohydric plants under severe drought. The two shrubs differently responded to precipitation manipulation. Ψ pd , A n and g s were higher under irrigation treatment than control for S. psammophila, and these three variables and Ψ md were significantly higher under irrigation treatment and lower under drought treatment than control for C. korshinskii. Leaf water potential and gas exchange responded to manipulated precipitation more strongly for C. korshinskii than for S. psammophila. However, precipitation manipulation did not alter the sensitivity of leaf gas exchange to vapor-pressure deficit and soil moisture in these two shrubs. Acclimation to long-term changes in soil moisture in these two shrubs was primarily attributed to the changes in leaf or canopy structure rather than leaf gas exchange. These findings will be useful for modeling canopy water-carbon exchange and elucidating the adaptive strategies of these two shrubs to future changes in precipitation.

show abstract

Ecophysiological responses of Caragana korshinskii Kom. under extreme drought stress: Leaf abscission and stem survives

Cited by 16 publications

References 36 publications

De novo analysis of transcriptome reveals genes associated with leaf abscission in sugarcane (Saccharum officinarum L.)

De novo analysis of transcriptome reveals genes associated with leaf abscission in sugarcane (Saccharum officinarum L.)

Carbon Storage Patterns of Caragana korshinskii in Areas of Reduced Environmental Moisture on the Loess Plateau, China

Responses of leaf water potential and gas exchange to the precipitation manipulation in two shrubs on the Chinese Loess Plateau

Contact Info

Product

Resources

About