The role of organic solute and ion accumulation in osmotic adjustment in drought-stressed grapevines

Patakas, Angelos; Νικολάου, Νικόλαος; Zioziou, Eleftheria; Radoglou, K.; Noïtsakis, B.

doi:10.1016/s0168-9452(02)00140-1

Cited by 231 publications

(177 citation statements)

References 35 publications

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“…The accumulation of carbohydrates plays an essential role in protection of drought-stressed plants from osmotic stress (Patakas et al 2002). It can not only maintain cellular growth and expansion of plants, but also keep stomata open for CO 2 assimilation at a lower water potential (Lawlor and Cornic 2002).…”

Section: Changes In Carbon Metabolism During Drought and Recoverymentioning

confidence: 99%

“…Usually, drought can directly cause osmotic stress, resulting in dehydration and even death of plant cells (Basu et al 2007). To cope with osmotic stress effectively, plants have evolved a great capacity to synthesize and accumulate nontoxic and compatible solutes that are termed as osmoprotectants (Patakas et al 2002). These compatible solutes may stabilize proteins and cellular structures and/or maintain cell turgor by osmotic adjustment to improve drought adaptation of plants (Upadhyaya et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

Liu

Wang

Pan

et al. 2015

Trees

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Key message Differential regulations of C and N metabolism in dwarf bamboo improve the capacity of osmotic adjustment, and also their metabolites may play an important role for protection against membrane lipid peroxidation under drought, thus accelerating recovery after rewatering. Abstract Dwarf bamboo (Fargesia rufa Yi), is a staple food for the endangered giant panda, but little is known about the impact of drought on bamboo species and its recovery mechanism. This study investigated the response of carbon (C) and nitrogen (N) metabolism to drought and subsequent recovery, and the relationship of their metabolites with lipid peroxidation. Photochemistry was reversibly down-regulated after drought, but a longer recovery time is needed. The accelerated degradation of starch due to a rapid increase in amylase activity resulted in higher soluble sugar only in severe drought-stressed plants after 30 days of drought. Sucrose content was not affected by drought because of the relative increases in activities of invertase, sucrose synthase, and sucrose phosphate synthase. As nitrate concentration increased in parallel with nitrate reductase activity, ammonium (NH 4 ? ) production was enhanced by drought. Also, activated glutamine synthetase/glutamate synthase cycle stimulated NH 4? assimilation, while hydrolysis of soluble proteins was accelerated, resulting in accumulation of amino acids. After rewatering, re-balancing of C metabolism has gradually begun, but a stronger N metabolism was still observed. The notable positive correlations between MDA and the contents of starch and proline after 15 days of drought as well as between MDA and the contents of soluble sugar, NSC and proline after 30 days of drought were displayed. We conclude that dwarf bamboo may not only differently regulate its C and N metabolism to improve the capacity of osmotic adjustment but also employ its different metabolites protect against membrane Communicated by M. Adams.

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Section: Changes In Carbon Metabolism During Drought and Recoverymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

Liu

Wang

Pan

et al. 2015

Trees

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“…O osmômetro de pressão de vapor tem sido usado com eficiência para medir o potencial osmótico das plantas (Ball & Osssterhuis, 2005). A redução do potencial osmótico em resposta ao déficit hídrico pode resultar de uma concentração passiva de solutos em virtude da desidratação da célula ou da acumulação ativa de solutos, esta última considerada ajuste osmótico (Patakas et al, 2002).…”

Section: Introductionunclassified

Comportamento hídrico e crescimento do feijão vigna cultivado em solos salinizados

Coêlho

Barros

Neto

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMOA salinização dos solos reduz a capacidade das plantas de absorver água o que, em geral, provoca diminuição na sua taxa de crescimento. As respostas das plantas ao estresse salino são melhor correlacionadas com o potencial osmótico do que com a condutividade elétrica do extrato de saturação do solo. Com o objetivo de avaliar os efeitos do estresse salino no crescimento, evapotranspiração e potencial osmótico foliar do feijoeiro vigna [Vigna unguiculata L. (Walp.)] conduziu-se um experimento em casa de vegetação da Universidade Federal Rural de Pernambuco (Recife, PE, Brasil). Os tratamentos constaram de um arranjo fatorial 2 x 4 composto de duas texturas de solo e quatro níveis de salinidade do solo (4, 8 e 12 dS m -1 a 25 ºC além da testemunha sem a adição de sais) com cinco repetições. Concluiu-se que a salinidade do solo causa redução no consumo de água, no potencial osmótico foliar, na altura das plantas, no número de folhas e na biomassa seca da parte aérea do feijoeiro vigna. Palavras-chave: potencial osmótico, salinidade, feijão caupiHydric behaviour and growth of cowpea cultivated in salinized soils ABSTRACT Soil salinization reduces the capacity of plants to absorb water, and in general causes decrease in plant growth. Plant responses to salt stress are better correlated with osmotic potential compared to electrical conductivity of soil saturation extract. In order to evaluate the effect of salt stress on growth, water use and leaf osmotic potential of cowpea [Vigna unguiculata L. (Walp.)], an experiment was carried out in a greenhouse of the Federal Rural University of Pernambuco (Recife-PE, Brazil). The treatments were in a factorial arrangement of 2 x 4, comprising of two soil textures and four levels of soil salinity (4, 8 and 12 dS m -1 at 25 °C, and the control without salt addition) with five replications. It was concluded that soil salinity causes reduction in water consumption, leaf osmotic potential, plant height, number of leaves and dry biomass of shoot of cowpea.

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“…Peningkatan perbesaran ini tidak sama antar spesies sampai akhir perlakuan dan berkisar antara 185% kali sampai hanya 78% pada periode yang sama. Kemampuan membentuk diameter trakea akar yang besar ini menguntungkan untuk mengoptimalkan jalan lewatnya air karena peningkatan diameter trakea akar merupakan suatu bentuk adaptasi untuk menambah penyerapan air dari tanah (Patakas et al, 2002). Meskipun demikian, perbesaran diameter ini dimungkinkan juga karena disebabkan pertumbuhan tanaman yang menjadi lebih besar.…”

Section: B Pembahasanunclassified

DROUGHT RESPONSES ON GROWTH, PROLINE CONTENT AND ROOT ANATOMY OF Acacia auriculiformis Cunn., Tectona grandis L., Alstonia spectabilis Br., AND Cedrela odorata L.

Hendrati¹,

Rachmawati²,

Pamuji³

2016

JPKW

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ABSTRAKPemanasan global yang terjadi beberapa tahun terakhir telah menyebabkan terjadinya cuaca ekstrim dan peningkatan suhu bumi yang juga menyebabkan kekeringan. Dalam upaya mengantisipasi pemanasan global diperlukan adanya lingkungan yang dapat menyerap emisi karbon, salah satunya adalah hutan. Salah satu upaya untuk mempertahankan keberadaan hutan, perlu dilakukan identifikasi spesies yang adaptif terhadap kondisi kekeringan. Penelitian ini bertujuan untuk mengetahui pertumbuhan tanaman dan anatomi akar Acacia auriculiformis Cunn., Tectona grandis L., Alstonia spectabilis Br. dan Cedrela odorata L. serta membandingkan spesies yang lebih adaptif terhadap kondisi kekeringan. Penelitian pada uji terkontrol ini, menggunakan perlakuan kekeringan selama 10, 20, 30 dan 40 hari serta tanaman kontrol yang disiram setiap 2 hari sekali. Masing-masing perlakuan dilakukan dengan 3 ulangan. Pertumbuhan tanaman yang diamati adalah tinggi, diameter, jumlah dan luas daun tanaman, kadar prolin akar serta aspek anatomis berupa diameter trakea. Pengamatan dan pengambilan sample dilakukan setiap 10 hari sekali. Data pertumbuhan dan prolin yang diperoleh dianalisis dengan uji T dan data anatomi dianalisis menggunakan ANOVA dilanjutkan uji Duncan dengan taraf signifikansi 95%. Kekeringan pada A. auriculiformis Cunn., T. grandis L., A. spectabilis Br. dan C. odorata L. mempengaruhi pertumbuhan tanaman berupa penurunan tinggi, diameter dan jumlah daun, namun terjadi peningkatan kadar prolin akar dan pertambahan diameter trakea akar. Hasil studi ini mengindikasikan bahwa spesies yang paling toleran dan kemungkinan adaptif terhadap kekeringan adalah spesies yang mempunyai lebih banyak variasi mekanisme respon terutama yang kemunculannya baru terlihat pada tekanan kekeringan yang tinggi.Kata kunci: Kekeringan, jenis pohon, pertumbuhan, prolin, anatomi ABSTRACT Global warming causes extreme weather and temperature leading to drought. Identification of drought adaptive species is essential. This research is aimed to examine growth, proline content and root anatomy of

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The role of organic solute and ion accumulation in osmotic adjustment in drought-stressed grapevines

Cited by 231 publications

References 35 publications

Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

Photosynthetic carbon and nitrogen metabolism and the relationship between their metabolites and lipid peroxidation in dwarf bamboo (Fargesia rufa Yi) during drought and subsequent recovery

Comportamento hídrico e crescimento do feijão vigna cultivado em solos salinizados

DROUGHT RESPONSES ON GROWTH, PROLINE CONTENT AND ROOT ANATOMY OF Acacia auriculiformis Cunn., Tectona grandis L., Alstonia spectabilis Br., AND Cedrela odorata L.

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