Shoot Dry Weight, Chlorophyll and UV-B-absorbing Compounds as Indicators of a Plant's Sensitivity to UV-B Radiation

Smith, Jennifer L.; Burritt, David J.; Bannister, P.

doi:10.1006/anbo.2000.1270

Cited by 134 publications

(108 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…necrotic patches could be attributed to the decrease in leaf chlorophyll content (up to 40%) on exposure to UV-B, which is widely reported (Smith et al, 2000;Strid and Porra, 1992;Vu et al, 1981).…”

Section: Effect Of Uv-b On Cotton Morphologymentioning

confidence: 64%

Cotton responses to ultraviolet-B radiation: experimentation and algorithm development

Reddy

Kakani

Zhao

et al. 2003

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

The potential impact of an increase in solar ultraviolet-B (UV-B) radiation due to human activity on higher plants has been the subject of many studies. Little work has been carried out so far on cotton responses to enhanced UV-B radiation. The objective of this study was to determine whether or not the current and projected increases in UV-B levels affect cotton growth and development, and to quantify and develop UV-B radiation functional algorithms that can be used in simulation models. Two experiments were conducted during the summer of 2001 using sunlit plant growth chambers in a wide range of UV-B radiations under optimal growing conditions. Leaves exposed to UV-B radiation developed chlorotic and necrotic patches depending on the intensity and length of exposure. Along with changes in visible morphology, cotton canopy photosynthesis declined with increased UV-B radiation. The decline in canopy photosynthesis was partly due to loss of photosynthetic pigments and UV-B-induced decay of leaf-level photosynthetic efficiency (maximum photosynthesis) and capacity (quantum yield) as the leaves aged. The total leaf area was less due to smaller leaves and fewer leaves per plant. Less plant height was closely related to a shorter average internode length rather than a fewer mainstem nodes. The UV-B did not affect cotton major developmental events such as time taken to square, time to flower, and leaf addition rates on the mainstem. Lower biomass was closely related to both smaller leaf area and lower photosynthesis. The critical limit, defined as 90% of optimum or the control, for stem elongation was lower (8.7 kJ m −2 per day UV-B) than the critical limit for leaf expansion (11.2 kJ m −2 per day UV-B), indicating that stem elongation was more sensitive to UV-B than leaf expansion. The critical limits for canopy photosynthesis and total dry weight were 7 and 7.3 kJ m −2 per day, respectively. The identified UV-B-specific indices for stem and leaf growth and photosynthesis parameters may be incorporated into cotton simulation models such as GOSSYM to predict yields under present and future climatic conditions.

show abstract

Section: Effect Of Uv-b On Cotton Morphologymentioning

confidence: 64%

Cotton responses to ultraviolet-B radiation: experimentation and algorithm development

Reddy

Kakani

Zhao

et al. 2003

Agricultural and Forest Meteorology

View full text Add to dashboard Cite

show abstract

“…2). An increase of UV-B absorbing compounds, a commonly used index to determine the relative value of leaf flavonoids, phenolic and other secondary compounds, as well as the enhancement of rutin to absorb/screen UV-B radiation and shield the underlying tissues form an adaptive mechanism (Smith et al, 2000;Warren et al, 2002). Rutin is a highly antioxidantively active flavonoid (Harborne and Williams, 2000).…”

Section: Effect Of Uv-b Radiation On Leaf Pigments and Uv-b Absorbingmentioning

confidence: 99%

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Yao

Xuan

et al. 2006

European Journal of Agronomy

View full text Add to dashboard Cite

“…indicador da sensibilidade das plantas para radiação UV-B (Smith et al 2000). Estas diferenças em biomassa também podem ser atribuídas ao efeito da radiação sobre expansão foliar, formando células menores e em menor número (Gonzales et al 1998;Nogués et al 1998).…”

unclassified

“…Estas diferenças em biomassa também podem ser atribuídas ao efeito da radiação sobre expansão foliar, formando células menores e em menor número (Gonzales et al 1998;Nogués et al 1998). A redução da biomassa é freqüentemente citada na literatura com um dos indicadores confiáveis da sensibilidade das plantas à radiação UV-B, uma vez que representa os efeitos negativos e acumulativos da radiação sobre as funções fisiológicas (Smith et al 2000). Os maiores valores médios de AEF (área específica foliar) para as folhas tratadas com UV-B ocorreram em função da menor redução da massa seca foliar quando comparada com a redução da área foliar, que foi maior.…”

unclassified

“…Alguns autores sugerem que plantas tratadas com radiação UV-B e que apresentam maiores concentrações de clorofila parecem ser mais tolerantes à radiação (Bornman & Vogelmann 1991;Greenberg et al 1997). Outros autores sugerem que plantas de crescimento rápido, como A. thaliana, são mais sensíveis à radiação e tendem a ter menores concentrações de clorofila (Barnes et al 1990), enquanto que outros consideram que as maiores concentrações de clorofila, juntamente com as maiores concentrações de compostos fenólicos, podem ser indicadores da resposta da planta à radiação, mas não um indicador de sensibilidade (Smith et al 2000).…”

unclassified

See 1 more Smart Citation

Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)

Boeger

Poulson

2006

Acta Bot. Bras.

View full text Add to dashboard Cite

RESUMO -(Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)). A redução da camada de ozônio resulta no aumento da radiação ultravioleta que atinge a superfície terrestre, especialmente a radiação ultravioleta-B (UV-B). O aumento da radiação poderá induzir a mudanças estruturais e fisiológicas nas plantas, influenciando no seu crescimento e desenvolvimento. O objetivo deste trabalho foi determinar os efeitos da radiação UV-B ambiente sobre a morfologia das folhas de Arabidopsis thaliana desenvolvidas em condições controladas. As sementes de A. thaliana cresceram em câmaras de crescimento, com 300 µmol m -2 s -1 de radiação fotossinteticamente ativa (PAR) com ou sem 6 kJ m -2 s -1 de radiação UV-B be (UV-B be ; UV-B biologicamente efetiva). Após 21 dias, 10 folhas de cada tratamento (com e sem radiação UV-B) foram coletadas para avaliar área foliar, massa fresca e seca, AEF, densidades estomáticas e de tricomas de ambas as faces da folha, espessura da lâmina foliar e concentração de compostos fenólicos e de clorofila total, a e b. As folhas tratadas com radiação UV-B apresentaram menor área foliar, massa fresca e seca, densidade de tricomas na face adaxial e densidade de estômatos na face abaxial da folha. Entretanto, apresentaram os maiores valores médios de espessura total da lâmina e do mesofilo, maior concentração de clorofila total, clorofila a e clorofila b e compostos fenólicos foliares do que as folhas não tratadas com radiação UV-B. Essas diferenças morfológicas significativas (p < 0,05) entre as folhas tratadas e não tratadas com radiação UV-B indicam que A. thaliana é sensível à radiação e possui mecanismos para minimizar os seus efeitos negativos sobre o desenvolvimento e crescimento foliar. Entretanto, as respostas da planta à radiação UV-B envolvem vários mecanismos fisiológicos que ainda necessitam de investigações mais detalhadas. Palavras-chave : Arabidopsis thaliana, radiação UV-B, morfologia foliar, compostos fenólicos ABSTRACT -(Effects of ultraviolet-B radiation on leaf morphology of Arabidopsis thaliana (L.) Heynh. (Brassicaceae)). Reduction of the ozone layer results in the increase in ultraviolet radiation reaching the earth's surface, especially the ultraviolet-B (UV-B). The increase of radiation may induce structural and physiological changes in plants, influencing their growth and development. This paper evaluates the effects of ambient UV-B radiation upon to the leaf morphology of Arabidopsis thaliana developed under controlled conditions. The seeds of A. thaliana grown in environmental chamber, with 300 µmol m -2 s -1 de photosynthetically active radiation (PAR) with and without 6 kJ m -2 s -1 of radiation UV-B be (UV-B be ; UV-B biologically effective). After 21 days, ten leaves of each treatment (with and without UV-B radiation) were collected to measure leaf area, fresh and dry mass, AEF, stomata and trichome densities of both leaf surfaces, leaf thickness and concentration of phenolic compounds and total chlorophyll, and ...

show abstract

Shoot Dry Weight, Chlorophyll and UV-B-absorbing Compounds as Indicators of a Plant's Sensitivity to UV-B Radiation

Cited by 134 publications

References 40 publications

Cotton responses to ultraviolet-B radiation: experimentation and algorithm development

Cotton responses to ultraviolet-B radiation: experimentation and algorithm development

Effects of ultraviolet-B radiation on crop growth, development, yield and leaf pigment concentration of tartary buckwheat (Fagopyrum tataricum) under field conditions

Efeitos da radiação ultravioleta-B sobre a morfologia foliar de Arabidopsis thaliana (L.) Heynh. (Brassicaceae)

Contact Info

Product

Resources

About