Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80255-6
Beate Diettrich , Heidelore Mertinat , Martin Luckner
In-vitro-grown shoots and clone plants of Digitalis lanata showed high rates of transpiration if placed in dry air. The easy loss of water was due to morphological and physiological abnormalities. Leaves of in-vitro-grown shoots and plants had a much thinner cuticle than greenhouse-grown plants and had less epicuticular lipids. Guard cell walls were not flexible enough to allow closure of the stomata. Stimuli like the withdrawal of K+ and BA, or the application of A13+ and ABA caused a reduction of the stomaaal aperture, but not complete closure. No change in aperture was obtained after the application of CO2 or the withdrawal of light. Stomata of vitrified leaves showed no response to any of the stimuli examined. The leaves formed in vitro were unable to develop further ex vitro. After a few weeks in the greenhouse they were replaced by newly formed physiologically normal leaves.
{"title":"Reduction of Water Loss during ex vitro Acclimatization of Micropropagated Digitalis lanata Clone Plants","authors":"Beate Diettrich , Heidelore Mertinat , Martin Luckner","doi":"10.1016/S0015-3796(11)80255-6","DOIUrl":"10.1016/S0015-3796(11)80255-6","url":null,"abstract":"<div><p><em>In-vitro</em>-grown shoots and clone plants of <em>Digitalis lanata</em> showed high rates of transpiration if placed in dry air. The easy loss of water was due to morphological and physiological abnormalities. Leaves of <em>in-vitro</em>-grown shoots and plants had a much thinner cuticle than greenhouse-grown plants and had less epicuticular lipids. Guard cell walls were not flexible enough to allow closure of the stomata. Stimuli like the withdrawal of K<sup>+</sup> and BA, or the application of A1<sup>3+</sup> and ABA caused a reduction of the stomaaal aperture, but not complete closure. No change in aperture was obtained after the application of CO<sup>2</sup> or the withdrawal of light. Stomata of vitrified leaves showed no response to any of the stimuli examined. The leaves formed <em>in vitro</em> were unable to develop further <em>ex vitro</em>. After a few weeks in the greenhouse they were replaced by newly formed physiologically normal leaves.</p></div>","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Pages 23-31"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80255-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88089536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80272-6
M. Metzlaff
{"title":"","authors":"M. Metzlaff","doi":"10.1016/S0015-3796(11)80272-6","DOIUrl":"10.1016/S0015-3796(11)80272-6","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Page 76"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80272-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89147461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80252-0
A. Romeike
{"title":"","authors":"A. Romeike","doi":"10.1016/S0015-3796(11)80252-0","DOIUrl":"https://doi.org/10.1016/S0015-3796(11)80252-0","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Page 12"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80252-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137363009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80275-1
P. Hanelt
{"title":"","authors":"P. Hanelt","doi":"10.1016/S0015-3796(11)80275-1","DOIUrl":"10.1016/S0015-3796(11)80275-1","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Page 78"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80275-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87054403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80251-9
Alia , Prasanna Mohanty , P. Pardha Saradhi
The effect of varying concentrations of sodium chloride (NaCl) (0, 100, 150 and 200 mM) on seedling growth, pigment composition and the primary photochemical activities in cotyledonary leaves of Brassica juncea cv. DIRA 367 was investigated. NaCl-stress resulted in a considerable decrease in growth of the seedlings without causing any significant change in dry weight. While, chlorophyll a content was higher in cotyledonary leaves of seedlings raised in high salt containing media, chlorophyll b content did not show any significant variation till 11th day of growth. Thus the high Chl a/Chl b ratio in NaCl treatments reflects changes in the photosynthetic antenna size. The carotenoid content in 11 day old cotyledonary leaves, on the other hand, was much reduced at high concentrations of NaCl. NaCl treatments caused an increase in water oxidation capacity, as measured through H2O → MV (whole chain) or H2O → PDOX (PS II) photoreactions, by 1.2 to 2.0 fold. But, PS I mediated photochemical activities showed no or only a minor increase by NaCl treatment. The enhancement in photochemical activities noted even in presence of uncouplers (NH4Cl and methyl amine) suggest that the NaCl induced enhancement of primary photochemical activity is not linked to the uncoupling of electron transport from photophosphorylation.
Also, the studies on the interactive effect of in vivo ageing and salinity on the pigment composition and primary photochemical activities suggest that ageing and NaCI-stress result in partly independent and partly interactive changes in the pigment composition and photochemical activities.
{"title":"Effect of Sodium Chloride on Primary Photochemical Activities in Cotyledonary Leaves of Brassica juncea","authors":"Alia , Prasanna Mohanty , P. Pardha Saradhi","doi":"10.1016/S0015-3796(11)80251-9","DOIUrl":"10.1016/S0015-3796(11)80251-9","url":null,"abstract":"<div><p>The effect of varying concentrations of sodium chloride (NaCl) (0, 100, 150 and 200 mM) on seedling growth, pigment composition and the primary photochemical activities in cotyledonary leaves of <em>Brassica juncea</em> cv. DIRA 367 was investigated. NaCl-stress resulted in a considerable decrease in growth of the seedlings without causing any significant change in dry weight. While, chlorophyll <em>a</em> content was higher in cotyledonary leaves of seedlings raised in high salt containing media, chlorophyll <em>b</em> content did not show any significant variation till 11th day of growth. Thus the high Chl <em>a</em>/Chl <em>b</em> ratio in NaCl treatments reflects changes in the photosynthetic antenna size. The carotenoid content in 11 day old cotyledonary leaves, on the other hand, was much reduced at high concentrations of NaCl. NaCl treatments caused an increase in water oxidation capacity, as measured through H<sub>2</sub>O → MV (whole chain) or H<sub>2</sub>O → PD<sub>OX</sub> (PS II) photoreactions, by 1.2 to 2.0 fold. But, PS I mediated photochemical activities showed no or only a minor increase by NaCl treatment. The enhancement in photochemical activities noted even in presence of uncouplers (NH<sub>4</sub>Cl and methyl amine) suggest that the NaCl induced enhancement of primary photochemical activity is not linked to the uncoupling of electron transport from photophosphorylation.</p><p>Also, the studies on the interactive effect of <em>in vivo</em> ageing and salinity on the pigment composition and primary photochemical activities suggest that ageing and NaCI-stress result in partly independent and partly interactive changes in the pigment composition and photochemical activities.</p></div>","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Pages 1-12"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80251-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79696484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80267-2
K. Müntz
{"title":"","authors":"K. Müntz","doi":"10.1016/S0015-3796(11)80267-2","DOIUrl":"10.1016/S0015-3796(11)80267-2","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Pages 72-73"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80267-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80623595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80269-6
K. Müntz
{"title":"","authors":"K. Müntz","doi":"10.1016/S0015-3796(11)80269-6","DOIUrl":"https://doi.org/10.1016/S0015-3796(11)80269-6","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Pages 74-75"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80269-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137362066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80268-4
H. Koblitz
{"title":"","authors":"H. Koblitz","doi":"10.1016/S0015-3796(11)80268-4","DOIUrl":"https://doi.org/10.1016/S0015-3796(11)80268-4","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Pages 73-74"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80268-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137362067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80254-4
E. Ohmann
{"title":"","authors":"E. Ohmann","doi":"10.1016/S0015-3796(11)80254-4","DOIUrl":"10.1016/S0015-3796(11)80254-4","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Page 22"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80254-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82790889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-02-01DOI: 10.1016/S0015-3796(11)80262-3
Th. Börner
{"title":"","authors":"Th. Börner","doi":"10.1016/S0015-3796(11)80262-3","DOIUrl":"https://doi.org/10.1016/S0015-3796(11)80262-3","url":null,"abstract":"","PeriodicalId":8798,"journal":{"name":"Biochemie und Physiologie der Pflanzen","volume":"188 1","pages":"Page 56"},"PeriodicalIF":0.0,"publicationDate":"1992-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0015-3796(11)80262-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137362064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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