Mechanical wounding-induced laticifer differentiation in rubber tree: An indicative role of dehydration, hydrogen peroxide, and jasmonates

Weimin, Tian; Yang, Shuguang; Shi, Minjing; Zhang, Shixin; Wu, Jang‐Yen

doi:10.1016/j.jplph.2015.04.010

Cited by 41 publications

(33 citation statements)

References 64 publications

(80 reference statements)

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“…The effect of linolenic acid and mechanical wounding on inducing the secondary laticifer differentiation may be ascribed to the increased level of endogenous jasmonates [7] . Although the jasmonic acid and methyl jasmonate are not the active form, (+)-7-iso-jasmonoyl-Lisoleucine [8] , they are effective in inducing the secondary laticifer differentiation [4,10] .…”

Section: Discussionmentioning

confidence: 99%

“…The coronatine is more effective than jasmonate acid and methyl jasmonate (MeJA) in inducing the secondary laticifer differentiation [6] . The mechanical wounding-induced secondary laticifer differentiation is limited to the wounded area and depends on endogenous jasmonates which acts downstream of reactive oxygen species caused by dehydration of the wounded tissues [7][8][9] . In addition, the induction of secondary laticifer differentiation induced by both the mechanical wounding and methyl jasmonate was influenced by season, which is associated with the content of endogenous cytokinin and the activity of vascular cambia [10] .…”

Section: Introductionmentioning

confidence: 99%

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The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

Zhang¹,

Wu²,

Weimin³

2016

Front. Agr. Sci. Eng.

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The secondary laticifer, a specific tissue in the secondary phloem of rubber tree, is differentiated from the vascular cambia. The number of the secondary laticifer in the trunk bark of rubber tree is positively correlated with rubber yield. Although jasmonates have been demonstrated to be crucial in the regulation of secondary laticifer differentiation, the mechanism for the jasmonate-induced secondary laticifer differentiation remains to be elucidated. By using an experimental morphological technique, the present study revealed that trichostatin A (TSA), an inhibitor of histone deacetylation, could induce the secondary laticifer differentiation in a concentrationdependent manner. The results suggest that histone acetylation is essential for the secondary laticifer differentiation in rubber tree.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

Zhang¹,

Wu²,

Weimin³

2016

Front. Agr. Sci. Eng.

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“…Each epicormic shoot flushes five to six times a year and includes a series of foliage clusters which are separated by the lengths of the leafless stems. Therefore, each of these morphologically distinct growth increments represents a growth flush and is referred to as an extension unit (EU)711. Under natural conditions, no secondary laticifers appear in the stem of EU1-2 (counted from the top of the shoot)711, which is convenient for distinguishing the induced secondary laticifers.…”

Section: Methodsmentioning

confidence: 99%

“…This number is clone-specific and is also influenced by environmental factors such as mechanical wounding and latex drainage8910. An important finding was that jasmonates play a pivotal role in the differentiation of secondary laticifers711. The active form of jasmonate is (+)-7-iso-jasmonoyl-L-isoleucine (JA-Ile), not jasmonic acid or methyl jasmonate as it was long thought to be12.…”

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confidence: 99%

Transcriptome Analysis of the Signalling Networks in Coronatine-Induced Secondary Laticifer Differentiation from Vascular Cambia in Rubber Trees

Zhang

Chao

et al. 2016

Sci Rep

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The secondary laticifer in rubber tree (Hevea brasiliensis Muell. Arg.) is a specific tissue within the secondary phloem. This tissue differentiates from the vascular cambia, and its function is natural rubber biosynthesis and storage. Given that jasmonates play a pivotal role in secondary laticifer differentiation, we established an experimental system with jasmonate (JA) mimic coronatine (COR) for studying the secondary laticifer differentiation: in this system, differentiation occurs within five days of the treatment of epicormic shoots with COR. In the present study, the experimental system was used to perform transcriptome sequencing and gene expression analysis. A total of 67,873 unigenes were assembled, and 50,548 unigenes were mapped at least in one public database. Of these being annotated unigenes, 15,780 unigenes were differentially expressed early after COR treatment, and 19,824 unigenes were differentially expressed late after COR treatment. At the early stage, 8,646 unigenes were up-regulated, while 7,134 unigenes were down-regulated. At the late stage, the numbers of up- and down-regulated unigenes were 7,711 and 12,113, respectively. The annotation data and gene expression analysis of the differentially expressed unigenes suggest that JA-mediated signalling, Ca2+ signal transduction and the CLAVATA-MAPK-WOX signalling pathway may be involved in regulating secondary laticifer differentiation in rubber trees.

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“…In addition, the leaves from different developmental stages were sampled from 6-year-old trees . The virgin trees (7-year-old) were selected for H 2 O 2 and wounding treatments, both of which are important factors involved in laticifer differentiation and tapping panel dryness in rubber tree (Hao and Wu 2000;Chen et al 2003;Putranto et al 2015;Tian et al 2015). The H 2 O 2 treatment (2%) was performed according to the method from Hao and Wu (2000).…”

Section: Plant Materials and Treatmentsmentioning

confidence: 99%

Molecular cloning and characterization of S-adenosylmethionine decarboxylase gene in rubber tree (Hevea brasiliensis)

Zhao

Liu

Zhi

et al. 2017

Physiol Mol Biol Plants

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S-Adenosylmethionine decarboxylase (SAMDC) is a key rate-limiting enzyme involved in polyamines biosynthesis, and it plays important roles in plant growth, development and stresses response. However, no SAMDC gene was reported in rubber tree. Here we report characteristics of an SAMDC gene (HbSAMDC1) in rubber tree. HbSAMDC1 contains a 1080 bp open reading frame (ORF) encoding 359 amino acids. Quantitative real-time PCR analyses revealed that HbSAMDC1 exhibited distinct expression patterns in different tissues and was regulated by various stresses, including drought, cold, salt, wounding, and H 2 O 2 treatments. HbSAMDC1 5 0 untranslated region (UTR) contains a highly conserved overlapping tiny and small upstream ORFs (uORFs), encoding 2 and 52 amino acid residues, respectively. No introns were located in the main ORF of HbSAMDC1, whereas two introns were found in the 5 0 UTR. In transgenic tobaccos, the highly conserved small uORF of HbSAMDC1 is found to be responsible for translational repression of downstream bglucuronidase reporter. To our knowledge, this is the first report on molecular cloning, expression profiles, and 5 0 UTR characteristics of HbSAMDC1. These results lay solid foundation for further elucidating HbSAMDC1 function in rubber tree.

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Mechanical wounding-induced laticifer differentiation in rubber tree: An indicative role of dehydration, hydrogen peroxide, and jasmonates

Cited by 41 publications

References 64 publications

The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

Transcriptome Analysis of the Signalling Networks in Coronatine-Induced Secondary Laticifer Differentiation from Vascular Cambia in Rubber Trees

Molecular cloning and characterization of S-adenosylmethionine decarboxylase gene in rubber tree (Hevea brasiliensis)

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