Cell membrane stability and leaf water relations as affected by nitrogen nutrition under water stress in maize

Premachandra, Gnanasiri S.; Saneoka, Hirohumi; Fujita, Kazuo; Ogata, Shoitsu

doi:10.1080/00380768.1990.10416802

Cited by 22 publications

(9 citation statements)

References 12 publications

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“…The cell membrane injury (MI) was determined as described by [ 55 ]. Sixty leaf discs (0.5 cm diameter) were cut from the middle portion of the leaf blade (five plants per variant) and washed out several times with distilled water.…”

Section: Methodsmentioning

confidence: 99%

The disadvantages of being a hybrid during drought: A combined analysis of plant morphology, physiology and leaf proteome in maize

et al. 2017

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A comparative analysis of various parameters that characterize plant morphology, growth, water status, photosynthesis, cell damage, and antioxidative and osmoprotective systems together with an iTRAQ analysis of the leaf proteome was performed in two inbred lines of maize (Zea mays L.) differing in drought susceptibility and their reciprocal F1 hybrids. The aim of this study was to dissect the parent-hybrid relationships to better understand the mechanisms of the heterotic effect and its potential association with the stress response. The results clearly showed that the four examined genotypes have completely different strategies for coping with limited water availability and that the inherent properties of the F1 hybrids, i.e. positive heterosis in morphological parameters (or, more generally, a larger plant body) becomes a distinct disadvantage when the water supply is limited. However, although a greater loss of photosynthetic efficiency was an inherent disadvantage, the precise causes and consequences of the original predisposition towards faster growth and biomass accumulation differed even between reciprocal hybrids. Both maternal and paternal parents could be imitated by their progeny in some aspects of the drought response (e.g., the absence of general protein down-regulation, changes in the levels of some carbon fixation or other photosynthetic proteins). Nevertheless, other features (e.g., dehydrin or light-harvesting protein contents, reduced chloroplast proteosynthesis) were quite unique to a particular hybrid. Our study also confirmed that the strategy for leaving stomata open even when the water supply is limited (coupled to a smaller body size and some other physiological properties), observed in one of our inbred lines, is associated with drought-resistance not only during mild drought (as we showed previously) but also during more severe drought conditions.

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Section: Methodsmentioning

confidence: 99%

The disadvantages of being a hybrid during drought: A combined analysis of plant morphology, physiology and leaf proteome in maize

et al. 2017

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“…Osmotic adjustment has been reported to be an important mechanism for drought adaptation in many crop plants (Turner and Jones 1980;Turner et al 1987;Ludlow and Muchow 1990;Morgan 1992;Subbarao et al 1995;Hare et al 1998), with enhanced osmotic adjustment as a result of increasing the optimal NPK nutrient application also having been widely reported (e.g. Yambao and O'Toole 1984;Bataglia et al 1985;Bennett et al 1986;Morgan 1986;Premachandra et al 1990). Under drought conditions, soluble sugars are the major contributors to osmotic adjustment mechanisms (Munns et al 1979;Michelena and Boyer 1982;Morgan 1984;Barlow 1986;Kriedemann 1986).…”

Section: Osmotic Adjustment and Turgor Maintenancementioning

confidence: 99%

Evaluation of the differential osmotic adjustments between roots and leaves of maize seedlings with single or combined NPK-nutrient supply

Studer

Schmidhalter

2007

Functional Plant Biol.

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Many physiological mechanisms associated with nutrient supply have been implicated as improving plant growth under drought conditions. However, benefits to plant growth under drought might derive from an increased recovery of soil water through osmotic adjustment in the shoots and especially in the roots. Thus, experiments were carried out to investigate the effects of the nutrients N, P and K applied singly or in combination, on the osmotic adjustment and turgor maintenance in the roots and leaves of maize seedlings. The seedlings were harvested between 18 and 37 days after sowing according to the soil matric threshold potentials. Soil matric potentials and shoot and root biomass were determined at harvest. Turgor pressure and osmotic adjustment of the leaves and roots were estimated by measurements of their water and osmotic potentials. Results showed that plants with either of the combined fertilisation treatments NPK or NP grew faster at a given level of drought stress than those with no fertilisation, N, P or K applied individually or the combined nutrient treatments PK and NK. Among the fertiliser applications with either a single or two combined nutrients, plants treated with any of N, P or NP grew faster than those with either K or NK. The association between the interactive effects of nutrients and drought stress on the osmotic adjustment and turgor maintenance in roots may partially explain the role of nutrients in drought tolerance of maize seedlings. In particular, the roots exhibited a higher osmotic adjustment than the leaves for all nutrient treatments, suggesting that shoot growth shows a higher sensitivity to water deficit compared to root growth. We conclude that the maintained turgor of roots under drought stress obtained with an optimal nutrient supply results in better root growth and apparently promotes overall plant growth, suggesting that osmotic adjustment is an adaptation not only for surviving stress, but also for growth under such conditions.

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“…Cell membrane stability was measured by the PEG test, leaf water potential and osmotic potential were measured, and dry matter and cell sap were analyzed as described in the previous paper (Premachandra et al 1990).…”

Section: Methodsmentioning

confidence: 99%

Cell membrane stability and leaf water relations as affected by phosphorus nutrition under water stress in maize

Premachandra

Saneoka

Fujita

et al. 1990

Soil Science and Plant Nutrition

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Cell membrane stability and leaf water relations as affected by nitrogen nutrition under water stress in maize

Cited by 22 publications

References 12 publications

The disadvantages of being a hybrid during drought: A combined analysis of plant morphology, physiology and leaf proteome in maize

The disadvantages of being a hybrid during drought: A combined analysis of plant morphology, physiology and leaf proteome in maize

Evaluation of the differential osmotic adjustments between roots and leaves of maize seedlings with single or combined NPK-nutrient supply

Cell membrane stability and leaf water relations as affected by phosphorus nutrition under water stress in maize

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