stomatal responses to drought stress and air humidity

... the drought treatment, we randomly se-lected one plant from three control and three stress treatment pots and measured photosynthesis (A) and stomatal conductance (gS) of the fifth leaf and the ... exchange in the fifth leaf and awn of barley Photosynthesis and stomatal conductance in the fifth leaf (a and c) and awn (b and d) were measured over the four-day drought treatment at the grain ... solutes to detoxify reactive oxygen species (ROS) and stabilize macromolecules and membranes [29–32] and mobilization of stem reserves (e.g., glucose, fructose, sucrose, and fructans) to supply

Ngày tải lên: 22/05/2020, 04:57

... environmental factor limiting grape yield and affecting berry quality Thermotolerance includes the direct response to heat stress and the ability to recover from heat stress To better understand the mechanism ... heat stress One hundred and seventy-four proteins were differentially expressed under heat stress and/or during the recovery phase, in comparison to unstressed controls, respectively Stress and ... after heat stress and recovery Analysis of proteins only responsive to heat stress A total of 71 proteins showed a specific response to heat stress, with 23 upregulated proteins, and 48 downregu-lated

Ngày tải lên: 27/05/2020, 01:47

... physiological and biochemical responses to drought stress A long-term drought treatment was applied to tomato plants by water withholding for 19 days followed by a rewatering phase Plants grown under drought ... shown in Fig 1b, stomatal conductance Fig 1 Morphological and physiological responses to drought-stress a Tomato plants at the 19th day of water withholding (Left) compared to control plants ... response to drought is essential to understand the mechanisms underlying plant adapta-tion to stress [5] In this study, we have focused on the chloroplast response to a long-term drought stress and

Ngày tải lên: 24/11/2022, 17:47

... attributable to a reduction in stomatal opening The likely sequence of events was thought to be increased salinity, water stress, stomatal closure, decrease in intracellular CO2, and decrease in photosynthesis ... OH, USA), in order to remove any humidity from the air The internal air pump in the gas analyzer provided a flow of fresh air, which was monitored with a flow meter and adjusted to the rate of 1 ... ability to tolerate NaCl to seawater level (500 mM) From the physiological aspects, the effects of salinity on the photosynthesis of mangroves have been studied to some extent, mostly in relation to

Ngày tải lên: 06/07/2014, 02:20

... the saplings to water stress by withholding irrigation and followed the total hydraulic conductance from soil to leaves, and the onset of embolism in twigs and petioles. MATERIAL AND METHODS Plant ... water-stressed and inoculated with O querci; (2) water-stressed and non-inoculated; (3) well-watered and inoculated; and (4) well-watered and non-inoculated (control) Two successive cycles of drought ... every second day and either the total amount (controls) half of (water stress) during the first drought cycle During the second, pots were left to dry out freely Predawn (ψ ) and midday (ψ

Ngày tải lên: 08/08/2014, 19:21

... mutant was similar to that of wild type (Figure 2) Altered tolerance of mutants and overexpression plants to abiotic stress ABA is involved in plant responses to ionic and osmotic stresses Since ... Plants are constantly exposed to a variety of biotic and abiotic stresses and have evolved intricate mechanisms to sense and respond to the adverse conditions Phyto-hormones such as salicylic ... involved in plant responses to abiotic stresses including drought, extreme temperatures and osmotic stress [4,5] ABA also plays a regulatory role in important plant growth and develop-mental

Ngày tải lên: 11/08/2014, 11:21

... drought stress Eight bean lines (NCB 280, NCB 226, SEN 56, SCR 2, SCR 16, SMC 141, RCB 593 and BFS 67) were identified as resistant to drought stress Resistance to terminal Trang 11drought stress ... r=-0.20**) under irrigated and drought conditions, respectively; also between DF and SNA (r=-0.26*** and r=-0.31***) and DPM and SNA (r=-0.27*** and r=-0.22***) under irrigated and drought conditions, ... check and susceptible to drought line DOR 390, vs the resistant to drought lines NCB 226, SCR 2 ALB 213 and SMC 141 (Table 3, Fig 3), and the line SMC 43 with low yielding under drought stress

Ngày tải lên: 17/04/2018, 16:18

... response to water stress The AtPUB46- T-DNA inser-tion mutants were found to be hypersensitive to water stress compared with WT plants The study was then expanded to the adjacent AtPUB47 and AtPUB48 ... affected by abiotic stresses Although salt stress generally causes osmotic-stress as well as ion toxicity, transcriptome analysis of plants ex-posed to salt- and osmotic-stresses revealed that ... that of AtPUB46 and AtPUB48 The Atpub19, Atpub22 and Atpub23 mu-tants showed enhanced tolerance to drought; in contrast, Atpub46and Atpub48 mutant plants were hypersensitive to water stress (Fig

Ngày tải lên: 22/05/2020, 05:11

... assigned a role as regulator of shoot growth in standard growth conditions [30] On the other hand, the ectopic expression of AtHB7 in tomato confers drought tolerance to this species [31] In another ... AtHB12 and AtHB7 expression levels fluctuate during development and in response to abiotic stress (A) Total RNA was isolated from 3- and 14-day-old WT plants and from leaves of 21, 28, 38 and 45-day-old ... postulated that AtHB7 and AtHB12 are negative developmental regulators in response to drought Moreover, based on the characterization of mutant and overexpressor plants on Ler (Landsberg) and WS (Wassilewskija)

Ngày tải lên: 27/05/2020, 02:04

... including acid invertase (AI) and neutral invertase (NI), can cleave sucrose into glucose and fructose, and SS, a glycosyl transferase, con-verts sucrose into UDP-glucose and fructose in the presence ... have the capacity to absorb soil nutrients and water for the host plant, resulting in better plant growth and drought tolerance1–3 In return, the host plant provides photosynthates to assist the ... enhance drought tolerance in plants, whereas little is known regarding AMF contribution to sucrose and proline metabolisms under drought stress (DS) In this study, Funneliformis mosseae and Paraglomus

Ngày tải lên: 04/12/2022, 15:36

... 3 Net photosynthesis (Anet) and stomatal conductance to wa-ter vapor (gs) of well watered () and water-stressed (•) glasshouse American chestnut seedlings and control (
) and drought stressed ... caliper, and canopy width Of the 20 plants, 10 plants were randomly assigned to a drought treatment and 10 plants were randomly assigned to a well-watered control 2.1.1 Substrate water and measurements ... Survey and synthesis of intra- and interspecific variation in stomatal sensitivity to vapour pressure deficit, Plant Cell Environ 22 (1999) 1515–1526 [32] Paillet F.L., Chestnut: history and ecology

Ngày tải lên: 07/08/2014, 16:20

... Trang 1Direct and correlated responses to selection for largeand small 6-week body weight in mice Yolanda BAYON, L.F FUENTE F SAN PRIMITIVO Departamento de Produceión Animal, Universidad ... 3.42 g and - 3.81 g for upward and downward selection, respectively Realized genetic correlations were 0.96 ± 0.03 between 6-week and 3-week weight and 0.50 ± 0.01 between 6-week weight and 3-6 ... body weight. II Materials and methods Mice used in the present experiment were obtained from a randombred population which was divided into 3 lines : W , C and W- Lines W+ and W- were selected on

Ngày tải lên: 09/08/2014, 22:22

... high-affinity uptake of protoporphyrin and cholesterol, leading to the hypothesis that the Arabidop-sis homologue functions in the transport of protoporphyrinogen IX to the mitochondria where heme ... mannitol, ABA and methyl viologen (MV), by extracting total RNA from these plants and performing quantitative real-time PCR (qRT-PCR) Compared to untreated plants, 150 mM NaCl, 250 mM mannitol, ... fused to the uidA reporter gene (AtTSPO-437::GUS), and transformed into plants, allowing in vivo analysis of AtTSPO transcriptional response to stress condi-tions AtTSPO-437::GUS was found to be

Ngày tải lên: 11/08/2014, 11:21

... seasonality and the changing climate (Huxman et al., 2005) To understand the causes of these variations, it is necessary to understand streamflow responses to changes in land-use/land-cover and climate ... and lake capacity decreased by 22% from 1954 to 1998 after parts of the lake, primarily its wetland areas, were drained to expand and meet the rising demands for lands for both agricultural and ... Province, the land-use and land-cover in the Xinjiang River basin can be categorized into agricultural land (23.2%), forested land (including for-est and shrub lands, 74.2%), grassland (2.3%), water

Ngày tải lên: 25/10/2019, 15:13

... exposure of plants to moderate stress can induce tolerance to severe stress Such treatment can improve tolerance to other stress as so-called cross-acclimation to stress usually functions to rescue plants ... 100}, where C and Trefer to electrical conductivity of control and drought trea-ted samples, and the subscript 1 and 2 refer to electric conduc-tivity readings before and after autoclaving, respectively ... great-er in Gmiza than in Sids Responses of dhns, wcor and dreb to drought stress Drought stress increased the transcript level of dhn in both cul-tivars after three days stress by about 2-folds (Fig

Ngày tải lên: 14/01/2020, 01:49

... also enhances tolerance to drought stress, oxidative stress and excess iron stress associated with the ROS scavenging As mentioned above, TaFER-5B was also induced by PEG, H2O2and excess iron ... for heat and drought stress, particularly molecular responses, to maintain nor-mal life activities [3, 4, 27] Forward and reverse genetics have been applied to identify key molecular factors that ... acclimation to environmental stress In this study, we successfully cloned the gene TaFER-5B and elucidated its function in tolerance to heat and other abiotic stresses in Arabidopsis and wheat

Ngày tải lên: 22/05/2020, 05:09

... Si021866m and Si013398m belong to type-I, Si036695m and Si022331m to type-II and Si016654m and Si023461m to type-IV “+PEG” and “−PEG” represent samples with (+PEG, drought-treated) and without ... intrinsic defense tool to resist drought stress in foxtail millet Fig 5 Expression pattern of C 4 photosynthetic-related genes and miRNA pathway-related regulators under drought stress a and b Heatmaps ... drought tolerance and water-use efficiency, foxtail millet is an ideal material to investigate the mechanisms of drought tolerance in plants To deepen our understand-ing of mRNA degradation and

Ngày tải lên: 26/05/2020, 20:03

... Trang 2to understand regulatory processes of drought stress[17] and leaf senescence [18] In plants drought stress is initiated by water deficit in soil resulting in osmotic and oxidative stress and ... genes (TRIUR3 and AVP1) were identified to be associated to drought stress tolerance in a previous study Conclusion: With respect to the expression of genes involved in drought stress and early leaf ... process of drought stress tolerance and drought stress induced leaf senescence as a basis for future breeding activ-ities it is of prime importance to understand how and when regulatory genes

Ngày tải lên: 26/05/2020, 20:42

... scavenger, increased tolerance against abi- otic stress in transgenic tobacco and yeast. J Exp Bot 60 , 339–349. 17 Mittler R (2002) Oxidative stress, antioxidants and stress tolerance. Trends Plant ... hormone signaling, biotic and abiotic stress responses, and development [15,16], whereas high concentrations of ROS can result in oxidative stress and cause irrevers- ible damage and hypersensitive ... JA, and methyl viologen (MV). The ectopic expression of GhMPK2 in transgenic tobacco plants led to enhanced resistance to fungi and viruses. This resistance was most probably attributable to elevated...

Ngày tải lên: 14/03/2014, 23:20

... induced by the drought treatment or to oversaturation of the leaf disks. Drought effects on stomatal conductance and net CO 2 assimilation rate Stomatal conductance to water vapor ... water stress and high irradiance, we subjected potted seed- lings to a gradually increasing drought and monitored predawn leaf water potential, gas exchange and photochemical ... 1991) and is therefore a useful tool to study physiological conse- quences of drought on photosynthetic elec- tron transport. To test responses of different oak spe- cies to...

Ngày tải lên: 08/08/2014, 19:21