Growth, gas exchange, water relations, and ion composition of Phaseolus species grown under saline conditions

Bayuelo-Jiménez, Jeannette S.; Debouck, Daniel G.; Lynch, Jonathan P.

doi:10.1016/s0378-4290(02)00179-x

Cited by 129 publications

(92 citation statements)

References 25 publications

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“…The reduction in P n was attributed mainly to decreases in g s . Similar decreases in photosynthetic capacity in NaCl-treated plants were observed by Meloni et al (2003) in cotton and by Bayuelo-Jimenez et al (2003) in Phaseolus species. In both studies the depression in P n was attributed to a reduction in stomatal conductance.…”

Section: Leaf Gas Exchangesupporting

confidence: 77%

Interactive effects of salinity and water stress on growth, leaf water relations, and gas exchange in amaranth(Amaranthusspp.)

Omami

Hammes²

2006

New Zealand Journal of Crop and Horticultural Science

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New Zealand Journal of Crop and Horticultural Science, 2006, Vol. 34: 33^4 0014- Abstract Amaranth (Amaranthus spp.) is a promising vegetable species often grown under semiarid conditions prone to both drought and salinity. This study was initiated to evaluate the effects of water and salinity stresses, both individually and in combination, on plant growth/leaf water relations and gas exchange of two amaranth genotypesAmaranthus tricolor and A. cruentus. Plants were grown in a greenhouse in plastic pots filled with a sand/vermiculite mixture and exposed to 8 days of drought and/or salinity stress, a recovery period of 8 days, followed by a final 2 weeks of stress. The treatments consisted of: (1) unstressed control; (2) 100 mM Nad (salt stress); (3) PEG (polyethylene glycol M w 6000) iso-osmotic to 100 mMNaCl (water stress); and (4) 50 mM NaQ + PEG iso-osmotic to 50 mM NaCl (salt + water stress). Plant growth (leaf, stem, root dry mass, root: shoot ratio, leaf area) were reduced by stress treatments. The reduction in shoot growth was greater in plants subjected to PEG-induced water stress (41% in A. tricolor and 44% in A. cruentus) than in salinised plants (37% in A. tricolor and 27% in A. cruentus). Leaf water and osmotic potentials were reduced by stress treatments whereas turgor potential was largely maintained. Photosynthetic rate, stomatal conductance, and water loss were reduced by all stress treatments. Photosynthetic water-use efficiency was increased by stress and was greater in salinised than in waterstressed plants. Salinised plants and those subjected to salt + water stress had a greater degree of osmotic adjustment, so that plants were able to continue growth for a longer period before drying, compared to water-stressed plants. Most parameters recovered when the stress treatments were discontinued. However, photosynthesis in salt-stressed plants did not recover indicating a toxic effect of salt on the photosynthetic apparatus. The combined effect of salt + water stress is less detrimental to plant growth than the sum of individual stresses.

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Section: Leaf Gas Exchangesupporting

confidence: 77%

Interactive effects of salinity and water stress on growth, leaf water relations, and gas exchange in amaranth(Amaranthusspp.)

Omami

Hammes²

2006

New Zealand Journal of Crop and Horticultural Science

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“…In sand, a slowly decreased SRR was observed when NaCl concentration was increased up to 30 mM, which agrees with the results obtained by Imas and Feigin (1995) in sweet corn and Bayuelo-Jiménez et al (2003) in four Phaseolus species. Also Savvas (2001) stated that there is a general consensus among the experimental results of many investigators that moderate levels of salinity affect the above-ground growth more than the root growth.…”

Section: Shoot: Root Ratio (Srr)supporting

confidence: 90%

“…2b), coinciding with other investigations (Ebert et al, 1999, Chartzoulakis et al, 2000Ferreira et al, 2002;Bayuelo-Jiménez et al, 2003). Lulo plants grown in peat and substrate mixture accumulated the highest total DM, whereas plants grown in sand built up the lowest DM.…”

Section: Total Dry Matter (Dm)supporting

confidence: 89%

Growth of lulo (Solanum quitoense Lam.) plants affected by salinity and substrate

et al. 2008

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-The effects of 0, 30 and 60 mM NaCl and substrates (red peat, sand or 3:1:1 [w/w] mixture of peat, sand, or soil) on vegetative growth of lulo, an Andean fruit species, during 12 weeks were studied. The experiment was carried out by using 2000 cm 3 of polypropylene plastic pots under greenhouse conditions. Plant height, number of leaves and nodes, leaf area, total plant dry matter (DM), and shoot/root ratio were evaluated. With the increase of salt concentration, the plant height, the number of leaves and nodes, the leaf areas and plant dry mass DM decreased, whereas shoot/root ratio increased. Sand grown lulo plants were most affected by salinity and presented total mortality at 60 mM NaCl. On the other hand, plants held either in peat or in substrate mixture developed larger height, greater leaf and node numbers, higher leaf area and dry matter content. Shoot/root ratio in control (soil) and sand-grown plants (30 mM NaCl) was lower. Index Terms: Lulo, naranjilla, salinity, NaCl, plant height, leaf area, dry matter, peat, sand. CRESCIMENTO DE PLANTAS DE LULO (Solanum quitoense Lam.) AFETADAS POR SALINIDADE E SUBSTRATOSRESUMO -Durante 12 semanas, foi estudado o efeito de 0; 30 e 60 mM de NaCl e dos substratos (turfa vermelha, ou de mistura de turfa, areia, ou solo 3:1:1 [w/w]) sobre o desenvolvimento vegetativo de lulo, uma espécie de fruto originária dos Andes. O experimento foi feito em condições de casa de vegetação, utilizando vasos plásticos de polipropileno de 2.000 cm 3 . Foram avaliadas as mudanças em altura de planta, número de folhas e nós, área foliar, massa seca total da planta (DM) e relação raiz parte aérea. Com o incremento da concentração salina, a altura de planta, o número de folhas e de nós, as áreas foliares e a massa seca da planta diminuíram, enquanto a relação parte aérea/raiz aumentou. As plantas de lulo cultivadas em areia foram as mais afetadas pela salinidade e apresentaram mortalidade total aos 60 mM de NaCl. Assim, as plantas mantidas em turfa ou na mistura de substratos apresentaram maiores alturas, número de folhas e nós, áreas foliares e conteúdo de massa seca. A relação parte aérea/raiz foi mais baixa no controle (solo) e nas plantas cultivadas em areia (30 mM NaCl). Termos para indexação: Solanum quitoense, salinidade, NaCl, altura de planta, área foliar, massa seca, turfa, areia.

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“…This is consistent with previous reports that watermelon plants are relatively sensitive to salt stress [4,16,22] . This reduction may be the result of slower leaf expansion (LAR) [23] or the reduction of photosynthetic activity (NAR) [24] . Our results show that inhibition of biosynthetic activity (RGR) was estimated by a decline in photosynthesis (NAR) rather than a reduction in leaf area (LAR).…”

Section: Discussionmentioning

confidence: 99%

Effect of Exogenous 24-Epibrassinolide on Salt Resistance of watermelon (Citrullus lanatus L.) under Salinity Stress

Cheng¹,

Huang²,

Meng³

et al. 2015

Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering

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Keywords: 24-epibrassinolide, watermelon, salt stress, relative growth rate, gas exchange. Abstract. The present study investigates the role of 24-epibrassinolide (EBL) in inducing plant tolerance to salinity. Seedlings of watermelon (Citrullus lanatus L.) were grown in the presence of 70 mM NaCl and were sprayed with 10 -6 M EBL at 7 days after transplantation and were sampled at 28 day. The plants exposed to NaCl exhibited a significant decline in relative growth rate, net CO2 assimilation, stomatal conductance, transpiration and water use efficiency. However, the follow up treatment with EBL significantly improved the above parameters. EBL treated plants had greater relative growth rate compared to untreated plants when exposed to salt stress. Application of EBL increased photosynthesis by increasing stomatal conductance in both control and salt stressed plants and may have contributed to the enhanced growth. The water use efficiency was improved because CO2 assimilation is more important than the transpiration.

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Growth, gas exchange, water relations, and ion composition of Phaseolus species grown under saline conditions

Cited by 129 publications

References 25 publications

Interactive effects of salinity and water stress on growth, leaf water relations, and gas exchange in amaranth(Amaranthusspp.)

Interactive effects of salinity and water stress on growth, leaf water relations, and gas exchange in amaranth(Amaranthusspp.)

Growth of lulo (Solanum quitoense Lam.) plants affected by salinity and substrate

Effect of Exogenous 24-Epibrassinolide on Salt Resistance of watermelon (Citrullus lanatus L.) under Salinity Stress

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