Structure and Ontogeny of Intraxylary Secondary Xylem and Phloem Development by the Internal Vascular Cambium in Campsis radicans (L.) Seem. (Bignoniaceae)

Rajput, Kishore S.; Gondaliya, Amit D.; Lekhak, Manoj M.; Yadav, Shrirang R.

doi:10.1007/s00344-017-9771-x

Cited by 12 publications

(11 citation statements)

References 28 publications

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“…adjacent to protoxylem derivatives) is free from the medullary phloem. Delayed development of internal phloem from the pith cells is also reported in Convolvulaceae (Cressa cretica) (14) and in Bignoniaceae (Campsis radicans) (30). As shown in figure 4F, some of the samples also showed development of internal phloem more or less simultaneously with the regular external phloem and lack of pith cells (that are morphologically different) on the adaxial side of the protoxylem derivatives.…”

Section: Discussionsupporting

confidence: 66%

Formation of medullary phloem in Argyreia nervosa (Burm. f.) Bojer

Kapadane¹,

Shelke

Gondaliya

et al. 2019

Plant Sci. Today

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Histologically, family Convolvulaceae is characterised by the presence of successive cambia, medullary (internal/intraxylary) and interxylary phloem in majority of the species, whereas some of the members are devoid of successive cambia and medullary bundles. The present study on Argyreia nervosa (Burm. f.) Bojer showed the presence of medullary bundles while internal phloem was absent during the primary growth. As the secondary growth progressed, successive cambia initiated from the pericyclic parenchyma. Development of medullary bundles began along with the regular protoxylem and protophloem while formation of intraxylary phloem was observed only after the initiation of secondary growth. Medullary/intraxylary sieve elements began to develop from the marginal pith cells. In thick stems, small segments of internal cambium initiated between the protoxylem and internal phloem. This internal cambium was functionally unidirectional and produced internal phloem centripetally. Developmental particulars are described in details along with its significance.

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Section: Discussionsupporting

confidence: 66%

Formation of medullary phloem in Argyreia nervosa (Burm. f.) Bojer

Kapadane¹,

Shelke

Gondaliya

et al. 2019

Plant Sci. Today

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“…Our results demonstrate that the same mechanism functions earlier in the vascular meristem development and it is involved in generation of the pool of procambial-derived cells, which ultimately become the first cambial cells. This finding can be partially supported by the fact that in another species with the successive cambium, Campsis radicans, the intraxylary phloem and an internal cambium develop from undifferentiated cells at the innermost bundle margin (at the protoxylem pole) (Rajput et al 2018).…”

Section: Discussionmentioning

confidence: 90%

“…Apart from the typical pattern of cambium formation, several anomalous cambia differing in their location, development and functioning are known in plants. Their activity is related to the formation of, for example, reticulate or furrowed secondary tissues, inclusions of phloem or xylem, reverse polarity of vascular tissues as well as formation of monkey ladder vines (Carlquist 1988(Carlquist , 1991IAWA Committee 1989;Philipson 1990;Araújo and Costa 2006;Schweingruber et al 2008;Spicer and Groover 2010;Terrazas et al 2011;Angyalossy et al 2012;Rajput et al 2013Rajput et al , 2018Fisher and Blanco 2014). The variety of anomalous cambia results in modified mechanical and conductive properties, increasing diversity of growth forms and demonstrating adaptive potential of plants (Rowe and Speck 2005).…”

Section: Introductionmentioning

confidence: 99%

Continuity of Procambium and Anomalous Cambium During Formation of Successive Cambia in Celosia argentea

Myśkow

Gola

Tulik

2019

J Plant Growth Regul

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The development of woody plants is related to the continuity of the procambium and cambium. Whether such a continuity is present in plants with successive cambia, especially in those, where the first cambium is formed outside the primary vascular bundles, has not been analyzed so far. Therefore, we studied the development of vascular meristem in Celosia argentea, in which the first and successive cambial cylinders arise outside the primary bundles and, intriguingly, in the literature are interpreted as developmentally independent structures. Our results showed that in C. argentea, the outermost procambial cells maintain their meristematic characteristics during differentiation of vascular bundles and divide periclinally, forming the zone of procambium-derived cells outside the primary bundles. This zone comprises parenchyma cells bordering the bundles, and a continuous ring of the incipient cambial cells neighboring the primary cortex. Later in the development, the ability to preserve the outermost cells in the cambium undifferentiated is repeated during the formation of successive cylinders of cambia. Together, our results clearly point to the developmental continuity of the procambium and successive cambia in C. argentea, despite their seemingly spatial distinctiveness. We postulate that the mechanism demonstrated in C. argentea is universal and orchestrates the development of successive cambia in other plant species.

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“…The stem anatomical structure that includes vascular, phloem, xylem, and pith were measured according to the previous method ( Rajput et al, 2018 ) with slight modification. The third internode of soybean stem was kept in FAA fixing solution for one month to soften.…”

Section: Methodsmentioning

confidence: 99%

Shade-Tolerant Soybean Reduces Yield Loss by Regulating Its Canopy Structure and Stem Characteristics in the Maize–Soybean Strip Intercropping System

et al. 2022

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The shading of maize is an important factor, which leads to lodging and yield loss of soybean in the maize–soybean strip intercropping system, especially in areas with low solar radiation. This study was designed to explore how shade-tolerant soybean reduces yield loss by regulating its canopy structure and stem characteristics in the maize–soybean strip intercropping system. The soybean cultivars Tianlong No.1 (TL-1, representative of shade-tolerant plants) and Chuandou-16 (CD-16, representative of shade-intolerant plants) were grown in monocropping and intercropping systems from 2020 to 2021 in Chongzhou, Sichuan, China. Regardless of shade-intolerant or shade-tolerant soybean, the canopy and stem of soybean in strip intercropping were weaker than those of the corresponding monoculture. But compared with shade-intolerant soybean, the shade-tolerant soybean slightly changed its spatial structure of canopy and stem morphology and physiology in maize–soybean strip intercropping system, especially in the later growth stages. On the one hand, the canopy of shade-tolerant soybean showed relatively high transmission coefficient (TC) and relatively low leaf area index (LAI) and mean leaf angle (MLA). On the other hand, the stem of shade-tolerant soybean was obviously stronger than that of shade-intolerant soybean in terms of external morphology, internal structure, and physiological characteristics. Additionally, compared with shade-intolerant soybean, shade-tolerant soybean showed higher APnWP (the average net photosynthetic rate of the whole plant) and seed yield in the strip intercropping. The results showed that shade-tolerant soybean increased light energy capture and photosynthesis in the different canopy levels to promote the morphological and physiological development of the stem and ultimately reduce the yield loss of the strip intercropping system. However, the molecular mechanism of low radiation regulating soybean canopy structure (LAI, TC, and MLA) needs further in-depth research to provide theoretical guidance for cultivating plants with ideal canopy shape that can adapt to changing light environment in intercropping system.

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Structure and Ontogeny of Intraxylary Secondary Xylem and Phloem Development by the Internal Vascular Cambium in Campsis radicans (L.) Seem. (Bignoniaceae)

Cited by 12 publications

References 28 publications

Formation of medullary phloem in Argyreia nervosa (Burm. f.) Bojer

Formation of medullary phloem in Argyreia nervosa (Burm. f.) Bojer

Continuity of Procambium and Anomalous Cambium During Formation of Successive Cambia in Celosia argentea

Shade-Tolerant Soybean Reduces Yield Loss by Regulating Its Canopy Structure and Stem Characteristics in the Maize–Soybean Strip Intercropping System

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