Abstract:
:Plants in the savanna-valleys in Southwest China are annually exposed to different combinations of multiple stresses from the hot-rainy, to chill-dry, and to warm-dry seasons. This study monitored seasonal changes in photosynthesis and photoprotection in an evergreen oak (Cyclobalanopsis helferiana) from one of these valleys for four years during which usual and abnormal drought occurred. In general, during the study period with decreasing xylem water potential (Psix), photosynthetic gas exchange, quantum yield of photosystem II (PSII) photochemistry and activities of most of the measured antioxidant enzymes decreased, while activities of the xanthophyll cycle and associated non-photochemical energy dissipation and glutathione peroxidase (GP) (EC 1.11.1.9) increased. In a fairly severe chill period, high concentration of reactive oxygen species induced high activities of most of the antioxidant enzymes and relatively stronger decrease in gas exchange. In the most severe dry period, even when predawn Psix decreased down to -4 MPa, considerable Pn (maximum photosynthetic rate) (4 micromol m(-2) s(-1)) was still maintained in midmorning. At this time, most of the antioxidant enzyme activities decreased to the lowest values, whereas the xanthophyll cycle and associated non-photochemical energy dissipation and GP activities increased to their highest levels. High predawn antheraxanthin and zeaxanthin contents were observed in the severe and very severe drought periods. Superoxide dismutase maintained high and fairly constant activity (1500-1800 U mg(-1) protein) and predawn maximum photochemistry efficiency of PSII was always above 0.8 throughout the whole study period. These results indicated that the photosynthetic apparatus of the oak leaves was highly capable of maintaining its function under the multiple stresses in different seasons in the present valley-savanna.
journal_name
Physiol Plantjournal_title
Physiologia plantarumauthors
Zhu JJ,Zhang JL,Liu HC,Cao KFdoi
10.1111/j.1399-3054.2008.01171.xsubject
Has Abstractpub_date
2009-01-01 00:00:00pages
62-72issue
1eissn
0031-9317issn
1399-3054pii
PPL1171journal_volume
135pub_type
杂志文章abstract::We investigated the fate of carbon dioxide (CO2 ) absorbed by roots or internally produced by respiration using gas exchange and stable isotopic labeling. CO2 efflux from detached leaves supplied with bicarbonate/CO2 solutions was followed over six cycles. CO2 effluxes were detected when bicarbonate solution at high p...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12767
更新日期:2019-03-01 00:00:00
abstract::The composition and concentrations of phenolic compounds were studied in the first true leaves, cotyledons, stems and roots of 2.5-week-old seedlings of mountain birch (Betula pubescens ssp. czerepanovii). The differences in secondary compounds among these plant parts were both qualitative and quantitative. In all par...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2003.00077.x
更新日期:2003-05-01 00:00:00
abstract::Hydraulic capacitance (C) in a plant tissue buffers the xylem tension, storing and releasing water and has been highlighted in recent years as an important factor that affects water relations such as drought tolerance and embolism formation. Aquaporins (AQPs) are well known to control leaf hydraulic resistance (Rh) bu...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12463
更新日期:2016-11-01 00:00:00
abstract::Exposing plants to low VPD reduces leaf capacity to maintain adequate water status thereafter. To find the impact of VPD on functioning of stomata, stomatal morphology and leaf anatomy, fava bean plants were grown at low (L, 0.23 kPa) or moderate (M, 1.17 kPa) VPDs and some plants that developed their leaves at modera...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12216
更新日期:2014-12-01 00:00:00
abstract::Uracil-DNA glycosylase (UDG) is the first enzyme in the base excision repair pathway for removal of uracil in DNA. DNA repair capacity is likely to be a critical factor in mutagenesis and thereby in the capacity to prevent genetic damage and unwanted variation. We have studied expression of UDG in 9 higher plant speci...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.1993.tb01389.x
更新日期:1993-08-01 00:00:00
abstract::Cold acclimation of etiolated cucumber seedlings, consisting of cooling at 12 degrees C for 48 h followed by a warming period at 25 degrees C, led to tolerance to subsequent chilling at 2 degrees C. Tolerance, as evidenced by freedom from chilling injury and continued growth, developed during the warming period in a t...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2002.1150408.x
更新日期:2002-08-01 00:00:00
abstract::Plants can sense the changes in the environmental light conditions with highly specialized photoreceptors. Phytochromes are sensitive to red and far-red light and have a dual role in the life of plants. These photoreceptors play an important role in plant growth and development from germination to seed maturation and ...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2003.00049.x
更新日期:2003-03-01 00:00:00
abstract::Seed germination recovery aptitude is an adaptive trait of overriding significance for the successful establishment and dispersal of extremophile plants in their native ecosystems. Cakile maritima is an annual halophyte frequent on Mediterranean coasts, which produces transiently dormant seeds under high salinity, tha...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12679
更新日期:2018-10-01 00:00:00
abstract::Plants must constantly adjust their growth and defense responses to deal with the wide variety of stresses they encounter in their environment. Among phytohormones, brassinosteroids (BRs) are an important group of plant steroid hormones involved in numerous aspects of the plant lifecycle including growth, development ...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12691
更新日期:2018-08-01 00:00:00
abstract::Despite intensive research on genetic regulation of flower development there are still only a few studies on the early phases of this process in perennial plants like trees. The aim of this study has been to identify genes that regulate early stages of inflorescence development in silver birch (Betula pendula Roth) an...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2001.1120113.x
更新日期:2001-05-01 00:00:00
abstract::The effect of various concentrations of aminoethoxyvinylglycine (AVG; 0.32 and 1.28 mM), an ethylene biosynthesis inhibitor, and of the polyamines putrescine (10 mM), spermidine (0.1, 1 and 5 mM) and spermine (2 mM) on peach (Prunus persica L. Batsch cv. Redhaven) fruit ripening was evaluated under field conditions. T...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2002.1140317.x
更新日期:2002-03-01 00:00:00
abstract::A greater understanding of the genetics of responses to water deficit/drought may be helpful in improving water-deficit resistance in the early stages of growth in rice. A recombinant inbred population derived from a cross between Zhenshan 97 and Minghui 63 was grown in hydroponic culture to characterize the responses...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2007.00991.x
更新日期:2008-01-01 00:00:00
abstract::The plant cell wall surrounds and protects the cells. To divide, plant cells must synthesize a new cell wall to separate the two daughter cells. The cell plate is a transient polysaccharide-based compartment that grows between daughter cells and gives rise to the new cell wall. Cellulose constitutes a key component of...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12703
更新日期:2018-09-01 00:00:00
abstract::Potassium (K(+)) is the most abundant ion in the plant cell and is required for a wide array of functions, ranging from the maintenance of electrical potential gradients across cell membranes, to the generation of turgor, to the activation of numerous enzymes. The majority of these functions depend more or less direct...
journal_title:Physiologia plantarum
pub_type: 杂志文章,评审
doi:10.1111/j.1399-3054.2008.01067.x
更新日期:2008-08-01 00:00:00
abstract::Water uptake from the soil via a vapor pathway was tested. Viburnum suspensum L. plants were divided into: (1) irrigated, (2) drought with vapor and (3) drought without vapor treatments. Each plant was placed into a larger bucket containing deuterium-labeled water as a vapor source (vapor treatment) or no water (droug...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.13173
更新日期:2020-11-01 00:00:00
abstract::Sulphur metabolism in plants provides a wealth of natural products, including several chemically unusual substances, such as thiosulphinates, polysulphides and isothiocyanates. Many of these reactive sulphur species (RSS) exhibit a distinct redox behaviour in vitro, which translates into a rather interesting biologica...
journal_title:Physiologia plantarum
pub_type: 杂志文章,评审
doi:10.1111/j.1399-3054.2008.01080.x
更新日期:2008-07-01 00:00:00
abstract::Methionine (Met) is biosynthesized by the activated methyl cycle and S-methylmethionine (SMM) cycle in one-carbon (C1) metabolism in plants. It is converted to S-adenosylmethionine (SAM) which serves as a precursor for many metabolites including glycinebetaine, methylated polyols, polyamines and ethylene which accumul...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2011.01516.x
更新日期:2012-01-01 00:00:00
abstract::It is known that ethylene signaling is involved in the regulation of the salt stress response. However, the molecular mechanism of ethylene-regulated salt stress tolerance remains largely unclear. In this study, an apple NAM ATAF CUC transcription factor, MdNAC047, was isolated and functionally characterized to be inv...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12724
更新日期:2018-11-01 00:00:00
abstract::Drought is one of the most adverse stresses that affect plant growth and yield. Disturbances in metabolic activity resulting from drought cause overproduction of reactive oxygen species. It is postulated that brassinosteroids (BRs) regulate plant tolerance to the stress conditions, but the underlying mechanisms remain...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12674
更新日期:2018-06-01 00:00:00
abstract::The enormous biological diversity of endophytes, coupled with their potential to enhance the production of bioactive metabolites in plants, has driven research efforts focusing on endophytes. However, limited information is available on the impacts of bacterial endophytes on plant secondary metabolism and signaling pa...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12236
更新日期:2015-01-01 00:00:00
abstract::Double-flower loquat (Eriobotrya japonica) is a new germplasm with homeotic transformation of stamen into petal in whorl 3. However, little information is available on the molecular mechanism of this transformation. Herein, we analyzed the transcriptome, candidate genes and endogenous hormones to investigate the mecha...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.13029
更新日期:2020-04-01 00:00:00
abstract::Cuttings of Populus kangdingensis and Populus cathayana originating from altitudes of 3500 and 1500 m in southwestern China, respectively, were grown for one growing season in the field under ambient or ambient plus supplemental ultraviolet-B (UV-B) radiation with two levels of nutrients. In both species, enhanced UV-...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2009.01328.x
更新日期:2010-03-01 00:00:00
abstract::Al was shown to elicit the induction of several pathogenesis-related genes, suggesting that a common signalling pathway may be involved in the early response to Al and pathogens. However, we found no evidence of oxidative burst involving either H2O2 or O2- during the first hours of Al exposure distinguishing the early...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1034/j.1399-3054.2002.1150109.x
更新日期:2002-05-01 00:00:00
abstract::In the context of an increased risk of extreme drought events across Europe during the next decades, the capacity of trees to recover and survive drought periods awaits further attention. In summer 2005, 4-year-old beech (Fagus sylvatica L.) saplings were watered regularly or were kept for 4 weeks without irrigation i...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2007.00972.x
更新日期:2007-11-01 00:00:00
abstract::In rice (Oryza sativa) seedlings, continuous white-light irradiation inhibited the growth of seminal roots but promoted the growth of crown roots. In this study, we examined the mechanisms of photoinhibition of seminal root growth. Photoinhibition occurred in the absence of nitrogen but increased with increasing nitro...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2009.01277.x
更新日期:2009-11-01 00:00:00
abstract::The effect of superoxide anion radicals on the photosynthetic electron transport chain was studied in leaves and isolated thylakoids from tobacco. Superoxide was generated by methylviologen (MV) in the light at the acceptor side of photosystem I (PSI). In isolated thylakoids, the largest damage was observed at the lev...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/j.1399-3054.2010.01416.x
更新日期:2011-05-01 00:00:00
abstract::Shoot-root communication is involved in plant stress responses, but its mechanism is largely unknown. To determine the role of roots in stress tolerance, cucumber (Cucumis sativus) shoots from plants with roots of their own or with figleaf gourd (Cucurbita ficifolia, a chilling-tolerant species) or luffa (Luffa cylind...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12200
更新日期:2014-11-01 00:00:00
abstract::The ATP-binding cassette (ABC) transporters belong to a large protein family predominantly present in diverse species. ABC transporters are driven by ATP hydrolysis and can act as exporters as well as importers. These proteins are localized in the membranes of chloroplasts, mitochondria, peroxisomes and vacuoles. ABC ...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.13302
更新日期:2020-12-06 00:00:00
abstract::Arsenic (As) accumulation adversely affects the growth and productivity of plants and poses a serious threat to human health and food security. In this study, we identified one As-responsive Really Interesting New Gene (RING) E3 ubiquitin ligase gene from rice root tissues during As stress. We named it Oryza sativa As...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12607
更新日期:2017-11-01 00:00:00
abstract::Fruit swelling determines fruit size and usually occurs in two distinct time periods in peach. However, little is known about the gene regulation of fruit swelling. In this study, measurements of longitudinal and transverse diameters in developing and ripening peach fruits unveiled two periods of fruit swelling: the f...
journal_title:Physiologia plantarum
pub_type: 杂志文章
doi:10.1111/ppl.12736
更新日期:2018-11-01 00:00:00