Abstract:
:This study has been carried out to investigate the photosynthetic activities in developing embryos of Sesbania sesban under a highly osmotic environment. In S. sesban, the embryo turns green/chlorophyllous at the early heart shape stage. Interestingly, despite being deeply embedded within the supporting tissues (several layers of pod wall, seed coat and endosperm) and developing in a highly osmotic environment, the growing embryo of the developing seed showed the presence of various components of photosynthetic machinery besides being chlorophyllous. The shade-adaptive nature of the photosynthetic machinery of the embryo is evident from (a) low chlorophyll a/b ratio, (b) photosystem (PS) II attaining maximal activity at low photon flux density and (c) lesser plastoquinone pool. The photosynthetic potential of the growing embryo seems to contribute towards seed filling as it has the potential not only to harvest light energy but also to fix CO2 as efficiently as other photosynthetic parts of S. sesban. In fact, ribulose-1,5 bisphosphate carboxylase purified from embryos manifested subunit composition similar to that of leaves. The PS II activity in leaves, cotyledonary leaves and pod wall declined sharply with increase in the level of NaCl and sucrose above 150 and 300 mmol, respectively. Amazingly, PS II activity in developing embryos was maximal in the presence of 250 mmol NaCl or 500 mmol sucrose and remained high even when NaCl and sucrose levels were increased to 500 and 1000 mmol, respectively. We hypothesize that the developing embryos have some factor(s) which protect(s) the photosynthetic machinery in an environment of high osmotic strength.
journal_name
J Plant Physioljournal_title
Journal of plant physiologyauthors
Puthur JT,Saradhi PPdoi
10.1016/j.jplph.2004.03.002subject
Has Abstractpub_date
2004-10-01 00:00:00pages
1107-18issue
10eissn
0176-1617issn
1618-1328pii
S0176-1617(04)00045-8journal_volume
161pub_type
杂志文章abstract::Plants developed receptors for solar UV-A/B radiation, which regulate a complex network of functions through the plant's life cycle. However, greenhouse grown crops, like tomato, are exposed to strongly reduced UV radiation, contrarily to their open-field counterparts. A new paradigm of modern horticulture is to suppl...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2017.11.013
更新日期:2018-02-01 00:00:00
abstract::Since gravistimulation is followed by alterations in the external current symmetry (Behrens et al., 1982), the effect of gravistimulation on cellular membrane potential was investigated using conventional glass microelectrode techniques. The resting potential of statocytes in a vertically oriented root is approx. -118...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/s0044-328x(84)80010-0
更新日期:1984-04-01 00:00:00
abstract::Two kinds of effects of water stress on flag leaves of spring wheat (Triticum aestivum L. cv. Kolibri) were recognized: the direct effect, when drought affected the expanded blade of the flag leaf and the indirect one, when drought pretreatment affected the leaf blade during tissue differentiation. As a direct effect ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/S0176-1617(84)80072-3
更新日期:1984-09-01 00:00:00
abstract::Drought stress is considered the most adverse factor restricting plant survival, growth, and productivity. The identification of the key adaptive mechanisms to drought stress is essential to enhance the drought resistance of plants. In this study, differential responses of three alfalfa varieties to drought, including...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2018.10.023
更新日期:2019-01-01 00:00:00
abstract::Calcium oxalate crystals are a major biomineralization product in higher plants. Their biological function and use are not well understood. In this work, we focus on the isolation and crystallochemical characterization of calcium oxalate crystals from seed coats of Phaseolus vulgaris (prisms) and leaves of Vitis vinif...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1078/0176-1617-00947
更新日期:2003-03-01 00:00:00
abstract::Tomato (Solanum lycopersicum L.) plants were transformed with an antisense construct of a cDNA encoding tomato telomere-binding protein (LeTBP1) to describe the role of a telomere-binding protein at the whole plant level. Fruit size decreased corresponding to the degree of suppression of LeTBP1 expression. This inhibi...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2011.05.009
更新日期:2011-11-01 00:00:00
abstract::The effects of methyl jasmonate and jasmonic acid on galanthamine production, phenolic acid content and growth of Leucojum aestivum L. shoot culture, cultivated in submerged conditions were investigated. The best time-point for addition of elicitors was during the exponential phase of the culture growth. The maximal c...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.03.017
更新日期:2013-08-15 00:00:00
abstract::Plants are able to acclimate to highly fluctuating light environment and evolved a short- and long-term light acclimatory responses, that are dependent on chloroplasts retrograde signalling. In this review we summarise recent evidences suggesting that the chloroplasts act as key sensors of light intensity changes in a...
journal_title:Journal of plant physiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.jplph.2013.06.005
更新日期:2013-11-15 00:00:00
abstract::In prior studies we learned that colonization of soil can be as important as colonization of roots in determining mycorrhizal influence on the water relations of host plants. Here we use a path analysis modeling approach to test (a) whether quantity of hyphae in soil contributes to variations in stomatal behavior and ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2006.08.005
更新日期:2007-10-01 00:00:00
abstract::The effect of excess copper on the expression of soluble proteins in 10-day old Phaseolus vulgaris seedlings was studied with two-dimensional electrophoresis and mass spectrometry, to find sensitive biochemical markers of exposure. Despite major differences in root Cu contents, both 15 and 50 microM Cu treatments resu...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2004.07.018
更新日期:2005-04-01 00:00:00
abstract::Hormones are included in the essential elements that control the induction of flowering. Ethylene is thought to be a strong inhibitor of flowering in short day plants (SDPs), whereas the involvement of abscisic acid (ABA) in the regulation of flowering of plants is not well understood. The dual role of ABA in the phot...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2008.04.009
更新日期:2008-12-01 00:00:00
abstract::Gibberellin 20-oxidases, enzymes of gibberellin (GA) biosynthesis, play an important role in (GA) homeostasis. To investigate the regulation of tomato SlGA20ox1 expression, a genomic clone was isolated, its promoter transcriptionally fused to the GUS reporter gene, and the construct used to transform Arabidopsis. Expr...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.03.019
更新日期:2010-09-15 00:00:00
abstract::This study investigates the influence of various rootstocks for pear on the phytochemical composition in the phloem above and below the graft union and the role of phenols in pear graft incompatibility. Assays of phloem with cambium from 4-year-old 'Conference', 'Abate Fetel' and 'Williams' pear trees grafted on diffe...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2013.10.022
更新日期:2014-03-01 00:00:00
abstract::Endogenous free polyamines (PAs), putrescine, spermidine and spermine, from developing fruitlets of Citrus species (Citrus unshiu Marc. and Citrus clementina Hort ex Tanaka) which differ in their parthenocarpic ability, and from uniflowered leafy and leafless inflorescences differing in their ability to set, have been...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.01.011
更新日期:2005-08-01 00:00:00
abstract::The correlation between structural changes of the vascular bundles and needle yellowing was examined for needles of damaged spruce (Picea abies (L.) Karst.) growing at a Mg-deficient and ozone polluted mountain site in the Central Black Forest (840m a.s.l.). In the previous year's sun-exposed needles, the following se...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.03.008
更新日期:2006-02-01 00:00:00
abstract::In Chloris gayana, salinity-associated yield decreases are due mainly to leaf area reductions. To understand the physiological basis for such reduction, the effects of salinity were studied on the spatial and temporal distribution of extension in the intercalary meristem at the leaf base, and on hydraulic conductance ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1078/0176-1617-00827
更新日期:2003-05-01 00:00:00
abstract::Biochemical, physiological and ultrastructural changes of the chloroplasts were examined in the course of the rapid yellowing process of spruce (Picea abies (L.) Karst.) at a Mg-deficient and ozone polluted mountain site (Schöllkopf mountain, Central Black Forest, Germany, 840 m a.s.l.). While at an early stage of yel...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1078/0176-1617-01095
更新日期:2004-04-01 00:00:00
abstract::Potassium channels are important for many physiological functions in plants, one of which is to regulate plant adaption to stress conditions. In this study, KCT2, the gene encoding a membrane-bound protein potassium channel (GenBank accession number: ), was isolated from Chinese cabbage (Brassica rapa ssp. Pekinensis)...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2005.09.002
更新日期:2006-09-01 00:00:00
abstract::Triacylglycerols (TAGs) are the most important energy storage form in oilseed crops. Diacylglycerol acyltransferase (DGAT) catalyzes the rate-limiting step of the Kennedy pathway of TAG biosynthesis. To date, little is known about the regulation of DGAT activity in peanut (Arachis hypogaea), an agronomically important...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2017.09.009
更新日期:2017-12-01 00:00:00
abstract::Reports on the effect of nitric oxide (NO) or reactive oxygen species (ROS) on photosynthesis and respiration in leaf tissues are intriguing; therefore, the effects of exogenous addition of sodium nitroprusside (SNP, releases NO) or H2O2 on the photosynthetic O2 evolution and respiratory O2 uptake by mesophyll protopl...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2020.153133
更新日期:2020-01-01 00:00:00
abstract::The phytohormone auxin is involved in the regulation of a variety of developmental processes. In this report, we describe how the processes of lateral root and root hair formations and root gravity response in rice are controlled by auxin. We use a rice mutant aem1 (auxin efflux mutant) because the mutant is defective...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2004.09.012
更新日期:2005-06-01 00:00:00
abstract::We have previously reported the molecular characterization of a putative sucrose:fructan 6-fructosyltransferase (6-SFT) of Bromus pictus, a graminean species from Patagonia, tolerant to cold and drought. Here, this enzyme was functionally characterized by heterologous expression in Pichia pastoris and Nicotiana tabacu...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.07.013
更新日期:2011-03-15 00:00:00
abstract::The distribution of the endogenous PA fractions throughout the entire perennial woody grapevine (Vitis vinifera L.) plant was studied, along with the expression profiles of the PA anabolic and catabolic genes and their substrates and secondary metabolites. Putrescine fractions increased with increasing leaf age, altho...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2009.03.013
更新日期:2009-09-15 00:00:00
abstract::Most of our knowledge on the regulation of photosynthesis originates from studies performed in highly controlled laboratory conditions. However, in their natural habitats plants are simultaneously subjected to a broad range of abiotic and biotic stimuli which influence photosynthetic efficiency; hence there is an emer...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2012.11.016
更新日期:2013-04-15 00:00:00
abstract::Germination is a complex process, highly dependent on various environmental factors, including temperature and water availability. Germinating soybean seeds are especially vulnerable to unfavorable environmental conditions and exposure to long-term abiotic stresses may result in diminishing much of the yield and most ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2012.11.020
更新日期:2013-03-15 00:00:00
abstract::Both H(2)O(2) and NO are involved in multiple physiological responses in plants. Metallothionein (MT) can bind heavy metal ions and reduce metal toxicity. Copper toxicity has become a major problem with increasing agricultural and environmental pollution. Here, we investigated the possible roles of ROS, NO and metallo...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.04.007
更新日期:2010-10-15 00:00:00
abstract::Increasing atmospheric CO₂ concentrations are expected to enhance plant photosynthesis and yield. Nevertheless, after long-term exposure, plants acclimate and show a reduction in photosynthetic activity (called down-regulation), which may cause a reduction in potential yield. Some authors suggest that down-regulation ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2010.06.015
更新日期:2010-12-15 00:00:00
abstract::Super-growing roots (superroots; SR), which have been established in the legume species Lotus corniculatus, are a fast-growing root culture that allows continuous root cloning, direct somatic embryogenesis and mass regeneration of plants under entirely growth regulator-free culture conditions. These features are uniqu...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2008.03.003
更新日期:2008-08-25 00:00:00
abstract::Salicylic acid (SA), 2-hydroxy benzoic acid, is a small phenolic compound with multifunction that is involved in plant growth, development, and the acquisition of stress tolerance. In recent years, hydrogen sulfide (H2S) has been found to have similar functions, but cross talk between SA and H2S in the acquisition of ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2014.12.018
更新日期:2015-04-01 00:00:00
abstract::The Basidiomycete fungus Ustilago maydis is the common agent of corn smut and is capable of inducing gall growth on infected tissue of the C4 plant maize (Zea mays). While U. maydis is very well characterized on the genetic level, the physiological changes in the host plant in response to U. maydis infection have not ...
journal_title:Journal of plant physiology
pub_type: 杂志文章
doi:10.1016/j.jplph.2007.05.008
更新日期:2008-01-01 00:00:00