Leaf plasticity in successive selection cycles of 'Saracura' maize in response to periodic soil flooding

Souza, Thiago Corrêa de; Magalhães, P. C.; Pereira, Fabricio José; Castro, Evaristo Mauro de; Silva, Jessé Marques da; Parentoni, S. N.

doi:10.1590/s0100-204x2010000100003

Cited by 42 publications

(41 citation statements)

References 28 publications

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“…Catoni et al (2012) reported lower palisade parenchyma thickness under lower temperatures and higher water availability in Cistus species. Palisade parenchyma is also directly related to photosynthesis (Souza et al, 2010) and shade leaves show a decrease of palisade parenchyma thickness in many plant species (Eschrich et al, 1989;Terashima et al, 2006). Therefore, as observed on the …”

Section: Resultsmentioning

confidence: 83%

Anatomy and physiology of Cattail as related to different population densities

et al. 2015

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-The objective of this work was to evaluate the effects of the population density of Typha angustifolia plants in the anatomical and physiological characteristics. Plants were collected from populations of high density (over 50% of colonization capacity) and low density (less than 50% of colonization capacity) and cultivated under controlled greenhouse conditions. Plants from both populations were grown in plastic trays containing 4 L of nutritive solution for 60 days. At the end of this period, the relative growth rate, leaf area ratio, net assimilatory rate, root/shoot ratio, leaf anatomy, root anatomy, and catalase and ascorbate peroxidase activities were evaluated. Plants from high density populations showed increased growth rate and root/shoot ratio. Low density populations showed higher values of stomatal index and density in leaves, as well as increased palisade parenchyma thickness. Root epidermis and exodermis thickness as well as the aerenchyma proportion of high density populations were reduced, these plants also showed increased vascular cylinder proportion. Only catalase activity was modified between the high and low density populations, showing increased values in low density populations. Therefore, different Typha angustifolia plants show differences in its anatomy and physiology related to its origins on high and low density conditions. High density population plants shows increased growth capacity related to lower apoplastic barriers in root and this may be related to increased nutrient uptake capacity.Keywords: macrophytes, Typha angustifolia, morphological plasticity, plant growth, ecological plant anatomy. RESUMO -O objetivo do trabalho foi avaliar os efeitos da origem em diferentes densidades populacionais de

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Section: Resultsmentioning

confidence: 83%

Anatomy and physiology of Cattail as related to different population densities

et al. 2015

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“…Field established plants had thicker epidermical faces, probably due to their exposure to the weather conditions, especially the higher light intensity. This feature can be useful for reflecting excessive radiation and reducing water loss (SOUZA et al, 2010). Leaf lamina thickness was also higher in field grown plants (Table 2).…”

Section: Leaf Anatomymentioning

confidence: 97%

Acclimatization and leaf anatomy of micropropagated fig plantlets

Chirinéa¹,

Pasqual

Araujo³

et al. 2012

Rev. Bras. Frutic.

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-The survival of micropropagated plants during and after acclimatization is a limiting process to plant establishment. There is little information on how the anatomy of vegetative organs of Ficus carica can be affected by culture conditions and acclimatization. The present research aimed to study the effects of time on culture medium and substrates during the acclimatization of fig tree plantlets produced in vitro, characterizing some leaf anatomy aspects of plantlets cultured in vitro and of fig trees produced in field. Plantlets previously multiplied in vitro were separated and transferred into Wood Plant Medium (WPM) where they were kept for 0, 15, 30, 45 and 60 days. Different substrates were tested and studies on leaf anatomy were performed in order to compare among plantlets grown in vitro, plantlets under 20, 40 and 60 days of acclimatization, and field grown plants. Keeping plantlets for 30 days in WPM allowed better development in Plantmax during acclimatization. Field grown plants presented higher number of stomata, greater epicuticular wax thickness and greater leaf tissue production compared to in vitro ones. The leaf tissues of in vitro plantlets show little differentiation and have great stomata number compared with acclimatized plants, which reduce the number of stomata during the acclimatization process. Index terms: Ficus carica L., substrate, stomata, parenchyma. ACLIMATIZAÇÃO E ANATOMIA FOLIAR DE PLÂNTULAS DE FIGO MICROPROPAGADASRESUMO: A sobrevivência de plantas micropropagadas durante e após a aclimatização é um processo limitante para o estabelecimento de plantas. Poucas informações são encontradas de como a anatomia de órgãos vegetativos de Ficus carica pode ser afetada pelas condições de cultivo e aclimatização. O presente trabalho teve por objetivo estudar os efeitos do tempo em meio de cultura e substratos durante a aclimatização de plântulas de figueira produzidas in vitro e cultivadas no campo. Plântulas multiplicadas in vitro foram separadas e transferidas para meio WPM, onde foram mantidas por 0; 15; 30; 45 e 60 dias. Diferentes substratos foram testados, e os estudos de anatomia foliar foram executados a fim de comparar plântulas crescidas in vitro, plântulas com 20; 40 e 60 dias de aclimatização e plantas crescidas a campo. Plântulas mantidas por 30 dias em WPM apresentaram melhor desenvolvimento em Plantmax durante a aclimatização. Plantas de campo apresentam elevado número de estômatos, maior espessura de cera epicuticular e do tecido foliar em comparação com plantas cultivadas in vitro. Já plântulas crescidas in vitro mostram tecidos foliares pouco desenvolvidos e maior número de estômatos em comparação com plantas aclimatizadas, que reduzem o número de estômatos ao longo do processo de aclimatização. Termos para Indexação: Ficus carica L., substrato, estômato, parênquima.

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“…One of them is the presence of a group of cells called motor bulliform cells, which are present in the upper side of the leaves, arranged in longitudinal rows parallel to the ribs, and may be grouped in a cross section of 2 to 8 cells (Alvarez et al, 2008). These cells promote curling of leaves under conditions of excessive loss of water or even flooding, reducing its specific area and forming a spiral (Souza et al, 2010). It was observed that most plants under a drought treatment had this leaf rolling condition after two days of irrigation, especially during the hottest times of the day.…”

Section: Fig 11mentioning

confidence: 99%

Leaf turgor pressure in maize plants under water stress

Riboldi¹,

Oliveira²,

Angelocci³

2016

Aust J Crop Sci

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Maize grown is affected by water stress reducing photosynthetic rate and availability of water in its tissues, decreasing plant yield. Monitoring plant water potential is an important indicator of the degree of water stress. With the new magnetic probe for determining leaf turgidity, it is possible to evaluate the water status of the plant and, in some cases, to indicate the optimal relative tolerance to water stress. The union of new and old approaches gives us a better knowledge of water relations in plats. Therefore, the aim of this study was to understand the behavior of maize plants subjected to water stress, using novel and conventional approaches. Maize plants were grown in pots in a greenhouse for 45 days. After this period, plants were subjected to water stress, where turgor measurements expressed by the variable Pp (patch pressure) were monitored. In addition, the leaf water potential, stomatal conductance, CO 2 assimilation, transpiration rate, and variable growth (height, leaf area and dry weight) had been monitored for 30 days. Two treatments were conducted, one in which the plant was irrigated and the other one in which irrigation was fully suspended for a period of time and monitored the water status. As the days passed, the plants showed the first visual signs of stress like leaf rolling. During this period, we observed fluctuating Pp values throughout the day, but with a recovery of turgor at night. There were significant differences between treatments for stomatal conductance, water potential, photosynthesis, and Pp, mainly before irrigation. After each irrigation, there has been a rapid recovery in all parameters. There was five periods of stress and it is possible to see a pattern of decreasing and increasing the Pp as the advance of stress, mainly in the last two. Maize plants had a big resilience in water stress conditions, due to mechanisms of water loss mitigation, like leaf rolling and possibly osmotic adjustment. Thus, it was concluded that Pp introduced a new approach to study plants subjected to water stress and it is a complement to other variables as CO 2 assimilation rate, stomatal conductance, transpiration rate, and leaf water potential.

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Leaf plasticity in successive selection cycles of 'Saracura' maize in response to periodic soil flooding

Cited by 42 publications

References 28 publications

Anatomy and physiology of Cattail as related to different population densities

Anatomy and physiology of Cattail as related to different population densities

Acclimatization and leaf anatomy of micropropagated fig plantlets

Leaf turgor pressure in maize plants under water stress

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