Effect of Benzyladenine and Hydroxybenzyladenosine on Gas Exchange of Bean and Sugar Beet Leaves

Pospíšilová, Jana; Rulcová, J.; Vomáčka, L.

doi:10.1023/a:1013782318041

Cited by 15 publications

(7 citation statements)

References 26 publications

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“…In agreement with other recent findings on sugar beet (Pospíšilová et al , 2001; Vomáčka & Pospíšilová, 2003; Monti et al , 2006 a ), the negative effects of transient water stress on P n were overall reversible, with photosynthetic rates of S1 rehydrated plants approaching those of well‐watered plants (Table 1). This was partially corroborated by the global pattern of photosynthetic parameters ( V c,max and J max ): after rehydration, in the last emitted leaves (D and E), V c,max and J max were, in fact, similar in S1 (rehydrated) and WW plants, considerably lower in S2, mainly as it concerns J max .…”

Section: Discussionsupporting

confidence: 92%

“…The changes in photosynthesis of individual leaves at variable water regimes or after rehydration have not received much attention as well (Pospíšilová et al , 2001; Vomáčka & Pospíšilová, 2003; Monti et al , 2006 a ). Woodward (1976) pointed out how in soybean, despite young plus mature leaves as a whole can ensure a fairly stable carbon assimilation rate through the growth cycle, individual leaves have very different photosynthetic capacities, both referring to same age leaves at variable phenological stage and to coexistent leaves of different age.…”

Section: Introductionmentioning

confidence: 99%

“…The authors concluded that this was somewhat related to a reduction of the root apparatus caused by drought. However, to what extent the photosynthesis is reversible after rehydration is still debatable, as recent findings on sugar beet show that photosynthesis can be completely recovered (Pospíšilová et al , 2001; Vomáčka & Pospíšilová, 2003; Monti et al , 2006 a ). Therefore, the main objective of this research was to assess how and to what extent photosynthesis decreases in individual leaves of sugar beet during the ontogeny and leaf ageing, and, if and why the negative effects of water stress may be reversible after rehydration.…”

Section: Introductionmentioning

confidence: 99%

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Photosynthesis on individual leaves of sugar beet (Beta vulgaris) during the ontogeny at variable water regimes

Monti

Barbanti

Venturi

2007

Annals of Applied Biology

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It is well known that the extent of yield reduction depends not only on the severity of water stress but also on the stage of plant development. Assessing photosynthetic response of individual leaves to water deficit during the ontogeny may, therefore, offer a clue to better understand the whole plant behaviour. This research aimed at investigating the influence of early and late water stress on net photosynthesis (P n ), carbon-isotope discrimination and other related traits on individual leaves during ontogeny. Sugar beet plants were grown in rain-sheltered soil columns of relevant volume (300 L), subdivided into well-watered (WW); early (S1) and late (S2) stress. In general, water stress significantly reduced leaf lifespan and P n . Relieving the stress at about one-third and twothirds of potential leaf life substantially restored P n at the levels of WW. Stressing a previously WW leaf brought about a comparatively heavier loss than stressing a leaf since the beginning. As for leaves at different phenological times, the early leaves had higher initial photosynthetic peaks but steeper falls during their lives. An insight into the relationships between P n and substomatal CO 2 concentration (C i ) shows that in mature leaves the photosynthetic restoration following stress relief did not entail a full recovery of the electron transport rate, the parameter most severely affected by the stress. The partial reversibility of the effects of water deficiency, associated to the anticipated leaf senescence and to the natural slow-down of net assimilation during leaf life, may be seen as a key factor in predicting to what extent the plant can tolerate drought and the damages caused by water stress.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photosynthesis on individual leaves of sugar beet (Beta vulgaris) during the ontogeny at variable water regimes

Monti

Barbanti

Venturi

2007

Annals of Applied Biology

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“…Possible explanation of the higher g s and consequently higher C i found in indeterminate accessions compared to determinate ones could be the differences in their ontogeny and senescence (LeWis et al 2002) and related higher cytokinin and auxin activity in indeterminate accessions. Several studies have reported a positive effect of low cytokinin (pospíšiLová et al 2001(pospíšiLová et al , 2005 and auxin (eaMus 1986) concentrations on the stomatal opening in common bean. This explanation is supported by the non-significant differences in g s between accessions of different origin and by the results of variance component analysis, which show that significant variation in g s , C i and WUE is related to differences in the growth type, and that a high percentage of variability in these traits could be attributed to different growth types.…”

Section: Discussionmentioning

confidence: 99%

Gas exchange capacity of Croatian common bean landraces (Phaseolus vulgaris L.) is related to their origin and growth type

Poljak¹,

Lazarević²,

Petek³

et al. 2018

J. Elem.

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The long tradition of common bean (Phaseolus vulgaris L.) cultivation in Croatia has resulted in the development of many landraces, which create a valuable basis for screening different physiological traits. Studying gas exchange parameters could provide valuable information that could be useful in creating new crop germplasm with enhanced agronomic attributes. Variability of gas exchange parameters, such as the net photosynthetic rate (A), transpiration rate (E), stomatal conductance (g s), intercellular CO 2 concentration (C i), light use efficiency (LUE), and water use efficiency (WUE) were studied on the collection of 226 common bean accessions and the relationship of the gas exchange parameters with the origin and morphological traits was tested. The highest variability among all landraces was found for the WUE and g s , and lowest for the A and LUE traits, indicating high potential of these traits to be used for selection and breeding programs. Accessions of the Mesoamerican origin had higher A and LUE and lower C i values compared to accessions of the Andean origin. Accessions with the determinate growth had higher g s and C i values and lower A, LUE and WUE values compared to accessions with the indeterminate growth. The variance components analysis showed that the growth type has a more pronounced effect on g s , C i and WUE, whereas the origin has a stronger impact on A and LUE. The principal component analysis (PCA) showed that A separates accessions according to their origin, whereas C i separates accessions according to their growth type. Accessions with higher C i had lower A, indicating possibly higher rates of carboxylation per active site on

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“…Some authors report increased photosynthesis and transpiration in various species after using auxin, e.g. in soybean [13,15,16], bean [17], cabbage [18], triticale [19], wheat [20], and barley [21]. In the opinion of many authors [22][23][24], exogenously used auxins and cytokinins have a significant influence on the condition of stomata, which are a gate for the transport of steam, carbon dioxide and oxygen to the interior of the leaf.…”

Section: Introductionmentioning

confidence: 99%

Changes in the physiological activity of soybean (Glycine max L. Merr.) under the influence of exogenous growth regulators

Nowak

Wróbel

2015

Acta Agrobot

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In a two-year pot experiment (2008–2009) conducted at the Vegetation Hall, West Pomeranian University of Technology in Szczecin, we investigated the influence of exogenous growth regulators, i.e. indole-3-butyric acid (IBA) and 6-benzylaminopurine (BAP) and their mixture, on the activity of gas exchange and selected physiological features of soybeans (Glycine max L. Merr.). The experimental factors included the following Polish soybean cultivars: ‘Aldana’, ‘Progres’ and ‘Jutro’. During plant growth, CO2 assimilation (A), transpiration rate (E), stomatal conductance (gs), and substomatal CO2 concentration (ci) were determined. Two soybean cultivars, i.e. ‘Jutro’ and ‘Progres’, showed a significant increase in the intensity of assimilation and transpiration after using all kinds of growth regulators as compared with the control plants. It was found that the ‘Jutro’ cultivar, after using a mixture of growth regulators (IBA + BAP), was characterized by the significantly highest CO2 assimilation (A) and transpiration (E) as well as the highest stomatal conductance (gs). The ‘Aldana’ cultivar, on the other hand, responded by a significant reduction in the transpiration rate, stomatal conductance and subsomatal CO2 concentration. The spraying of the plants with exogenous growth regulators had a significant influence on the increase in the number of stomata and stomatal pore length, mostly on the lower epidermis of the lamina. It was also found that plants from the ‘Jutro’ and ‘Aldana’ cultivars sprayed with IBA and IBA + BAP were characterized by the highest yield, as compared with the control plants. In the case of the ‘Jutro’ cultivar, after using the growth regulators, a positive correlation was observed between the assimilation and transpiration rates and the length of stomata, which in consequence produced increased yields.

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Effect of Benzyladenine and Hydroxybenzyladenosine on Gas Exchange of Bean and Sugar Beet Leaves

Cited by 15 publications

References 26 publications

Photosynthesis on individual leaves of sugar beet (Beta vulgaris) during the ontogeny at variable water regimes

Photosynthesis on individual leaves of sugar beet (Beta vulgaris) during the ontogeny at variable water regimes

Gas exchange capacity of Croatian common bean landraces (Phaseolus vulgaris L.) is related to their origin and growth type

Changes in the physiological activity of soybean (Glycine max L. Merr.) under the influence of exogenous growth regulators

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