Salt Glands in the Poaceae Family and Their Relationship to Salinity Tolerance

Céccoli, Gabriel; Ramos, Júlio César; Pilatti, Vanesa; Dellaferrera, Ignacio; Tivano, J. C.; Taleisnik, Edith; Vegetti, Abelardo Carlos

doi:10.1007/s12229-015-9153-7

Cited by 60 publications

(31 citation statements)

References 103 publications

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“…Although salinity and nutrient levels may have changed during the experiment due to mechanisms of absorption, retention and excretion (Liphschitz et al, 1974;Kao et al, 2003;Céccoli et al, 2015), we consider that the results on the plant growth are consistent allowing the conclusions presented in this paper.…”

Section: Resultssupporting

confidence: 89%

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Nunes

Camargo

2016

Hydrobiologia

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Environmental gradients and competition influence aquatic macrophyte distribution in estuaries. The competition-to-stress hypothesis states that some species are excluded from lower estuaries (high salinity) due to abiotic stress and others from upper estuaries (low salinity) by competition. The growth of Crinum americanum L. and Spartina alterniflora Loisel. in monoculture (10:0/0:10) and mixed culture (5:5) under different salinity levels (4/12/26) was analysed by a laboratory experiment (3 cultures 9 3 sediment types 9 3 replicate) to understand the role of competition and salinity on the distribution of these species in a tropical estuary as well as to verify whether the competition-to-stress hypothesis explains their zonation. We tested the hypothesis that S. alterniflora is not established in the upper estuary due to the effect of competition with C. americanum, whereas the latter presents restrictions to high salinity and has greater competitive ability in the upper estuary. Our data confirm the competition-to-stress hypothesis but not as proposed originally. We conclude that abiotic stress (low nutrient availability) is responsible for the absence of S. alterniflora in the upper estuary and that the competition between the two species is responsible for the absence of C. americanum in the lower estuary.

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Section: Resultssupporting

confidence: 89%

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Nunes

Camargo

2016

Hydrobiologia

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“…A recent review by Céccoli et al (2015) provides a detailed report of chloridoid type salt gland structures and their physiological features (Type 3 in Figure 1 ). Although somewhat similar to the salt-secreting glands of eudicots, the salt glands of grasses differ in three important ways.…”

Section: Salt Glands Are Structurally Diversementioning

confidence: 99%

“…Wall protrusions and the associated plasma membrane extend from the cap cell deep into the basal cell, increasing surface area. These are often found in epidermal depressions, within the folds of the leaf laminar structure, sunken in the epidermis, or placed above the epidermis (Liphschitz and Waisel, 1974; Céccoli et al, 2015). The continuous cuticle on the epidermis in some species thickens on top of the cap cell and forms a cuticular chamber that stores secreted salts as seen for some eudicot salt glands (Amarasinghe and Watson, 1988).…”

Section: Salt Glands Are Structurally Diversementioning

confidence: 99%

Making Plants Break a Sweat: the Structure, Function, and Evolution of Plant Salt Glands

Dassanayake

Larkin

2017

Front. Plant Sci.

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Salt stress is a complex trait that poses a grand challenge in developing new crops better adapted to saline environments. Some plants, called recretohalophytes, that have naturally evolved to secrete excess salts through salt glands, offer an underexplored genetic resource for examining how plant development, anatomy, and physiology integrate to prevent excess salt from building up to toxic levels in plant tissue. In this review we examine the structure and evolution of salt glands, salt gland-specific gene expression, and the possibility that all salt glands have originated via evolutionary modifications of trichomes. Salt secretion via salt glands is found in more than 50 species in 14 angiosperm families distributed in caryophyllales, asterids, rosids, and grasses. The salt glands of these distantly related clades can be grouped into four structural classes. Although salt glands appear to have originated independently at least 12 times, they share convergently evolved features that facilitate salt compartmentalization and excretion. We review the structural diversity and evolution of salt glands, major transporters and proteins associated with salt transport and secretion in halophytes, salt gland relevant gene expression regulation, and the prospect for using new genomic and transcriptomic tools in combination with information from model organisms to better understand how salt glands contribute to salt tolerance. Finally, we consider the prospects for using this knowledge to engineer salt glands to increase salt tolerance in model species, and ultimately in crops.

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“…The most intensively studied example of this response is wheat, where salt tolerance is highly related to leaf blade Na exclusion and high K/Na ratios (Munns et al ., ). As Na is considered to be toxic for metabolism (Maathuiss and Amtmann, ), Na‐accumulating grass species regulate the cellular compartmentation of this cation (Apse and Blumwald, ) or have effective mechanisms to extrude it (Céccoli et al ., ), and these mechanisms are also related to salt tolerance. Therefore, as the third objective of this work, salinity‐induced changes in leaf blade concentrations of K and Na, soluble sugars, proline and glycine betaine were assessed, and their relatedness to relative salt tolerance of the selected P. coloratum plants was considered.…”

Section: Introductionmentioning

confidence: 99%

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

Pittaro

Andreu

Bruno

et al. 2015

Grass and Forage Science

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This work assessed intracultivar variability for salt tolerance within Panicum coloratum cv. Klein, explored some physiological parameters potentially associated with it and evaluated the contribution of cell division and expansion to the decreased leaf length observed under salinity. Individual plants that had survived severe stress environments in an established pasture were collected and clonal families were obtained by vegetative propagation. These were evaluated in a greenhouse, in pots with an inert substrate irrigated with nutrient solution containing 0, 200 or 400 mm NaCl. Salt tolerance was assessed from growth variables expressed as a percentage of non‐salinized controls. Changes induced by salinity in carbon fixation, soluble sugars and compatible solutes were also measured. The selected plants showed 33% higher salt tolerance than plants from the same cultivar obtained from seeds, and variability for salt tolerance was detected within the group, suggesting these plants could be valuable germplasm for breeding programmes for saline areas. All selected plants accumulated low leaf blade Na concentrations (< 0·1 mm g−1 dry weight on average), and K concentrations tended to remain high under salinity. A kinematic analysis indicated a reduction in the number of cells in the division‐only zone was the main cause of shorter leaves under stress. Although plants showed some differences in all these traits, they were not related to salt‐tolerance variability within this group of stress‐tolerant plants.

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Salt Glands in the Poaceae Family and Their Relationship to Salinity Tolerance

Cited by 60 publications

References 103 publications

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Do interspecific competition and salinity explain plant zonation in a tropical estuary?

Making Plants Break a Sweat: the Structure, Function, and Evolution of Plant Salt Glands

Salt tolerance variability among stress‐selected Panicum coloratum cv. Klein plants

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