Root Growth and Morphology of Carex Species as Influenced by Oxygen Deficiency

Moog, Petra R.; Janiesch, Peter

doi:10.2307/2389339

Cited by 44 publications

(31 citation statements)

References 13 publications

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“…Shoot transections were made right above the shoot base, and leaf transections were made 1 cm above leaf initiation. The average root length of each species was remarkably in¯uenced by the 40 d of growth under aerobic/anaerobic conditions (C. extensa: 10.1/ 7.4 cm; C. remota 19.8/10.5 cm; C. pseudocyperus 6.9/9.2 cm; see Moog and Janiesch 1990). For anatomical studies only those roots were used that showed typical, nearly average root lengths for the respective treatment.…”

Section: Methodsmentioning

confidence: 99%

“…This study focuses on three closely related Carex species, which in natural stands dier in their¯ooding tolerance, and, in the same order, dier in anoxia tolerance. In an earlier study (Moog and Janiesch 1990), it was shown that C. extensa from sandy, well-drained stands responds to long-term root anaerobiosis (40 d) with a decrease in biomass and was classi®ed as¯ooding-sensitive according to Crawford and Tyler (1969). The other two species, C. remota and C. pseudocyperus, from fresh and wet stands, respectively, had a higher biomass under anaerobic than under aerobic root conditions and have therefore been termed ooding-tolerant.…”

Section: Introductionmentioning

confidence: 99%

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Flooding tolerance of Carex species. I. Root structure

Moog

1998

Planta

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Young Carex extensa Good., C. remota L. and C. pseudocyperus L. plants were subjected to aerobic or anaerobic growth conditions in nutrient solution for 40 d. Root anatomy was studied by serial transsections and longitudinal sections of the root tip. Under both growth conditions, the¯ooding-intolerant C. extensa developed the typical Carex root pattern, i.e. an intact cortex in the youngest part of the root, but lysogenous aerenchyma in maturing parts. In contrast,¯ooding-tolerant C. remota from periodically¯ooded habitats showed a similar root anatomy to C. extensa under aerobic conditions, but a cortex with ®ne intercellular spaces throughout most of the root under anaerobic conditions. The¯ooding-tolerant C. pseudocyperus from permanently¯ooded stands developed an intact cortex over most of the root length under both growth conditions. Fine intercellular spaces on four sides of each cortical cell penetrated into the very tip of the root in this species, connecting the whole root with the lacunae of the leaves and the atmosphere. In both ooding-tolerant species, morphometry showed that even under anaerobic growth conditions and despite the maintenance of a juvenile growth habit, i.e. intact cortical cells, the average root porosities were more than 20% and there was an increase in the contact area between intercellular gas spaces and the surface of cortical cells. While C. remota showed radial oxygen loss along the whole root length, C. pseudocyperus released oxygen to an oxygen-free medium only at the root tip. It is concluded that the maintenance of a juvenile root structure in combination with a system of ®ne intercellular spaces allows ecient nutrient uptake and plant growth during anaerobiosis in¯ooding-tolerant Carex species, in contrast to those species which may tolerate periods of anaerobiosis by forming aerenchyma at the cost of decreased nutrient uptake and growth.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flooding tolerance of Carex species. I. Root structure

Moog

1998

Planta

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“…Therefore, plants with this anatomic root structure are unable to supply the high metabolic demands during the growth and development periods (Moog, 1998). As suggested by Moog and Janiesch (1990), flood-tolerant plants are capable of sustaining growth, even under waterlogged conditions, by maintaining a high ratio of active cortex cells in the roots.…”

Section: Aspects Of Developmentmentioning

confidence: 99%

Anatomy and genetic diversity of two populations of Schinus terebinthifolius (Anacardiaceae) from the Tibagi River basin in Paraná, Brazil

Ea¹,

Cf²,

Ps³

et al. 2011

Genet. Mol. Res.

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ABSTRACT. Knowledge of the effects of flooding on plant survival is relevant for the efficiency of management and conservation programs. Schinus terebinthifolius is a tree of economic and ecological importance that is common in northeast Brazil. Flooding tolerance and genetic variation were investigated in two riparian populations of S. terebinthifolius distributed along two different ecological regions of the Tibagi River basin. Flooding tolerance was evaluated through the investigation of young plants, submitted to different flooding intensities to examine the morphological and anatomical responses to this stress. The growth rate of S. terebinthifolius was not affected by flooding, but total submersion proved to be lethal for 100% of the plants. Morphological alterations such as hypertrophied lenticels were observed in both populations and lenticel openings Anatomic aspect and genetic diversity of S. terebinthifolius were significantly higher in plants from one population. Genetic analysis using DNA samples obtained from both populations showed a moderate degree of genetic variation between populations (13.7%); most of the variation was found within populations (86.3%). These results show that for conservation purposes and management of degraded areas, both populations should be preserved and could be used in programs that intend to recompose riparian forests.

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“…Moog and Janiesch [21] reported that oxygen deficiency affected production of root biomass in three Carex species from varying hydrological habitats. The degree of stress in root zone hypoxia is associated with growth stage, growth conditions, and genotypes [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

Resistant Evaluation of Kiwifruit Rootstocks to Root Zone Hypoxia Stress

Mi¹,

Ma²,

Chen³

2013

AJPS

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In this thesis, 10 species of kiwifruit rootstocks were treated with hydroponics hypoxia to study their root zone hypoxia tolerance. The results were as follows: growth of all kiwifruit seedlings was inhibited. The max length of new root, plant height, plant biomass, root activity, relative growth rate of leaves, and content of chlorophyll in leaves under root zone hypoxia stress obviously declined comparing with control. MDA content, relative conductance in the leaves and roots all increased in 10 kinds of kiwifruit seedlings. The sensitivities of 10 kinds' kiwifruit seedlings to hypoxia stress were obviously different. With the method of subordinate function and cluster analysis, the adversity resistance coefficient of 10 kinds' kiwifruit seedlings, were comprehensively evaluated in order to appraise their hypoxia-tolerance abilities. According to the results, "Hayward", "Qinmei", "Jinxiang", "Kuoye", "Huayou" kiwifruit seedlings held higher tolerance to root zone hypoxia stress, while "Hongyang" kiwifruit seedlings were sensitive to root zone hypoxia stress. The others, including "Xixuan", "Maohua", "Jinhua", "Shanli" kiwifruit seedlings kept moderate resistant intensity to root zone hypoxia stress. The kiwifruit seedlings' resistance order from strong to

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Root Growth and Morphology of Carex Species as Influenced by Oxygen Deficiency

Cited by 44 publications

References 13 publications

Flooding tolerance of Carex species. I. Root structure

Flooding tolerance of Carex species. I. Root structure

Anatomy and genetic diversity of two populations of Schinus terebinthifolius (Anacardiaceae) from the Tibagi River basin in Paraná, Brazil

Resistant Evaluation of Kiwifruit Rootstocks to Root Zone Hypoxia Stress

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