Enhanced photosynthesis, carbohydrates, and energy metabolism associated with chitosan‐induced drought tolerance in creeping bentgrass

Crop Science ◽  
2020 ◽  
Vol 60 (2) ◽  
pp. 1064-1076 ◽  
Author(s):  
Zhaoqiao Liu ◽  
Ting Liu ◽  
Linlin Liang ◽  
Zhou Li ◽  
Muhammad Jawad Hassan ◽  
...  
Keyword(s):  
Energy Metabolism ◽  
Drought Tolerance ◽  
Creeping Bentgrass

scholarly journals Transcriptional Regulation of Hydrogen Peroxide and Calcium for Signaling Transduction and Stress-defensive Genes Contributing to Improved Drought Tolerance in Creeping Bentgrass

2020 ◽  
Vol 145 (4) ◽  
pp. 236-246
Author(s):  
Zhou Li ◽  
Yan Peng ◽  
Bingru Huang
Keyword(s):  
Transcription Factors ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Creeping Bentgrass ◽  
Grass Species ◽  
Regulation Of Transcription ◽  
Signaling Transduction ◽  
Genes Expression ◽  
Protective Genes ◽  
Ca Signaling

Small molecules, including H2O2 and Ca, mediate stress signaling and drought tolerance in plants. The objective of this study was to determine whether improvement in drought tolerance by H2O2 and Ca were associated with the regulation of transcription factors and stress-protective genes in perennial grass species. Plants of creeping bentgrass (Agrostis stolonifera) were sprayed with water (control), H2O2 (9 mm), or CaCl2 (10 mm) and exposed to drought stress for 20 days in controlled-environment growth chambers. Foliar application of H2O2 or Ca led to significant improvement in drought tolerance of creeping bentgrass, as demonstrated by greater turf quality, leaf relative water content, chlorophyll content, photochemical efficiency, and cell membrane stability, as compared with the untreated control. The application of H2O2 and Ca resulted in significant up-regulation of genes in Ca signaling transduction pathways [Ca-dependent kinase 26 (CDPK26), mitogen-activated protein kinase 1 (MAPK1), and 14-3-3] and transcript factors (WRKY75 and MYB13). For genes encoding antioxidant enzymes, H2O2 mainly enhanced superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), and dehydroascorbate reductase (DHAR) expression, while Ca primarily improved transcript levels of SOD, monodehydroascorbate reductase (MDHAR), and GR. In addition, heat shock protein 70 (HSP70), metallothionein 1 (MT1), and glutamine synthetase 2 (GS2) were also markedly up-regulated by H2O2 and Ca under drought stress. However, the transcript level of lipoxygenase 3 (LOX3) was significantly down-regulated by H2O2 and Ca under well-watered and drought conditions. These results imply that H2O2 and Ca commonly or differentially regulate genes expression in association with drought tolerance through activating Ca signaling pathway and regulating transcription factors and stress-protective genes expression, leading to the alleviation of lipid peroxidation, maintenance of correct protein folding and translocation, and enhancement of nitrogen metabolism under a prolonged period of drought stress in creeping bentgrass.

scholarly journals Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass

PLoS ONE ◽  
2016 ◽  
Vol 11 (4) ◽  
pp. e0154005 ◽  
Author(s):  
Zhihui Chang ◽  
Yang Liu ◽  
Hui Dong ◽  
Ke Teng ◽  
Liebao Han ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Creeping Bentgrass

Overexpression of barley hva1 gene in creeping bentgrass for improving drought tolerance

2006 ◽  
Vol 26 (4) ◽  
pp. 467-477 ◽  
Author(s):  
Daolin Fu ◽  
Bingru Huang ◽  
Yanmei Xiao ◽  
Subbaratnam Muthukrishnan ◽  
George H. Liang
Keyword(s):  
Drought Tolerance ◽  
Creeping Bentgrass

Quantitative Trait Loci Associated with Drought Tolerance in Creeping Bentgrass

Crop Science ◽  
2014 ◽  
Vol 54 (5) ◽  
pp. 2314-2324 ◽  
Author(s):  
Emily Merewitz ◽  
Faith Belanger ◽  
Scott Warnke ◽  
Bingru Huang ◽  
Stacy Bonos
Keyword(s):  
Quantitative Trait Loci ◽  
Drought Tolerance ◽  
Quantitative Trait ◽  
Creeping Bentgrass ◽  
Trait Loci

scholarly journals Changes in Carbon Partitioning and Accumulation Patterns during Drought and Recovery for Colonial Bentgrass, Creeping Bentgrass, and Velvet Bentgrass

2006 ◽  
Vol 131 (4) ◽  
pp. 484-490 ◽  
Author(s):  
Michelle DaCosta ◽  
Bingru Huang
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Water Status ◽  
Creeping Bentgrass ◽  
Carbon Partitioning ◽  
Perennial Grasses ◽  
Species Variation ◽  
Carbohydrate Accumulation ◽  
Drought Treatment ◽  
Drought Duration

Efficient carbon distribution and utilization may enhance drought survival and recovery ability for perennial grasses. The objectives of this study were to examine changes in carbon partitioning and carbohydrate accumulation patterns in shoots and roots of colonial bentgrass (Agrostis capillaris L.), creeping bentgrass (A. stolonifera L.), and velvet bentgrass (A. canina L.) in response to drought and re-watering following drought, and to determine whether species variation in drought tolerance and recuperative potential is related to differences in the patterns of carbon partitioning and accumulation. The experiment consisted of three treatments: 1) well-watered control; 2) drought, irrigation completely withheld for 18 days; and 3) drought recovery, a group of drought-stressed plants were re-watered at the end of the drought treatment (18 days). Drought tolerance and recuperative ability of three species was evaluated by measuring turf quality and leaf relative water content. These parameters indicated that velvet bentgrass was most drought tolerant while colonial bentgrass had highest recuperative ability among the three species. Plants were labeled with 14CO2 to determine carbon partitioning to shoots and roots. Carbohydrate accumulation was assessed by total nonstructural carbohydrate (TNC) content. The proportion of newly photosynthesized 14C partitioned to roots increased at 12 days of drought compared to the pre-stress level, to a greater extent for velvet bentgrass (45%) than for colonial bentgrass (35%) and creeping bentgrass (30%). In general, the proportion of 14C was highest in roots, intermediate in stems, and lowest in leaves at 12 days of drought treatment for all three bentgrass species. As drought duration and severity increased (18 days), 14C partitioning increased more in leaves and stems relative to that in roots for all three species. Stem TNC content was significantly greater for drought-stressed plants of colonial bentgrass and velvet bentgrass compared to their respective well-watered control plants, whereas no differences in stem TNC content were observed between drought-stressed and well-watered creeping bentgrass. Our results suggest that increased carbon partitioning to roots during initial drought stress represented an adaptive response of bentgrass species to short-term drought stress, and increased carbon partitioning and carbohydrate accumulation in stems during prolonged period of drought stress could be beneficial for rapid recovery of turf growth and water status upon re-watering.

scholarly journals Evaluation of Drought Tolerance and Avoidance Traits for Six Creeping Bentgrass Cultivars

HortScience ◽  
2008 ◽  
Vol 43 (2) ◽  
pp. 519-524 ◽  
Author(s):  
Stephen E. McCann ◽  
Bingru Huang
Keyword(s):  
Drought Stress ◽  
Drought Tolerance ◽  
Water Use ◽  
Photochemical Efficiency ◽  
Creeping Bentgrass ◽  
Root Production ◽  
Drought Avoidance ◽  
Relative Water ◽  
Leaf Relative Water Content ◽  
Use Efficiency

The objectives of this study were: 1) to compare drought responses between the more recently developed creeping bentgrass cultivars to standard cultivars and 2) to determine differential drought tolerance and avoidance characteristics associated with cultivar variation in drought resistance. Six cultivars of creeping bentgrass (Agrostis stoloniferia) (‘Penn A-4’, ‘Independence’, ‘Declaration’, ‘L-93’, ‘Penncross’, and ‘Putter’) were maintained in growth chambers at 20 °C day/15 °C night either well-watered or exposed to drought stress by withholding water for 17 days. Cultivars varied in turf performance and physiological responses (leaf relative water content and photochemical efficiency) to drought stress, which was reflected in their differences in drought tolerance (osmotic adjustment) and drought avoidance traits (water use rate and efficiency, root viability, root length, and number). ‘Penn A-4,’ ‘Independence,’ and ‘L-93’ generally performed better than other three cultivars under drought conditions, mainly through maintaining higher water use efficiency, root viability, root elongation, or root production. The majority of physiological parameters evaluated suggested that of the six creeping bentgrass cultivars examined in this study, the three cultivars with better ability to survive drought stress used mainly avoidance traits related to water use and water uptake.

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