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Dr. QIAN ZHANG
Fujian Agriculture and Forestry University, Fuzhou 350002, China

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0 Plant Physiology
0 Plant nutrients
0 Water Use Efficiency
0 Plant Microbiome
0 Genome evolution

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Journal article
Published: 19 June 2021 in Plant Physiology and Biochemistry
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Phosphorus (P) deficiency largely restricts plant growth and lead to severe yield losses. Therefore, identification of novel root traits to improve P uptake is needed to circumvent yield losses. White lupin (Lupinus albus) is a legume crop that develops cluster roots and has the high phosphorus use efficiency in low P soils. We aimed to investigate the association between cluster roots (CR) rhizosheath formation and P uptake in white lupin. Rhizosheath formation and P concentration were evaluated under four soil treatments. CR increased up to 2.5-fold of overall plant dry weight under SD–P compared to WW + P (control), partly attributable to variations in CR development. Our data showed that SD–P significantly increase rhizosheath weight in white lupin. Among the root segments, MCR showed improved P accumulation in the root which is associated with increased MCR rhizosheath weight. Additionally, a positive correlation was observed between MCR rhizosheath weight and P uptake. Moreover, high sucrose content was recorded in MCR, which may contribute in CR growth under SD–P. Expression analysis of genes related to sucrose accumulation (LaSUC1, LaSUC5, and LaSUC9) and phosphorus uptake (LaSPX3, LaPHO1, and LaPHT1) exhibited peaked expression in MCR under SD-P. This indicate that root sucrose status may facilitate P uptake under P starvation. Together, the ability to enhance P uptake of white lupin is largely associated with MCR rhizosheath under SD–P. Our results showed that gene expression modulation of CR forming plant species, demonstrating that these novel root structures may play crucial role in P acquisition from the soil. Our findings could be implicated for developing P and water efficient crop via CR development in sustainable agriculture.

ACS Style

Mehtab Muhammad Aslam; Joseph K. Karanja; Wei Yuan; Qian Zhang; Jianhua Zhang; Weifeng Xu. Phosphorus uptake is associated with the rhizosheath formation of mature cluster roots in white lupin under soil drying and phosphorus deficiency. Plant Physiology and Biochemistry 2021, 166, 531 -539.

AMA Style

Mehtab Muhammad Aslam, Joseph K. Karanja, Wei Yuan, Qian Zhang, Jianhua Zhang, Weifeng Xu. Phosphorus uptake is associated with the rhizosheath formation of mature cluster roots in white lupin under soil drying and phosphorus deficiency. Plant Physiology and Biochemistry. 2021; 166 ():531-539.

Chicago/Turabian Style

Mehtab Muhammad Aslam; Joseph K. Karanja; Wei Yuan; Qian Zhang; Jianhua Zhang; Weifeng Xu. 2021. "Phosphorus uptake is associated with the rhizosheath formation of mature cluster roots in white lupin under soil drying and phosphorus deficiency." Plant Physiology and Biochemistry 166, no. : 531-539.

Systematics and phylogeny
Published: 19 April 2021 in TAXON
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We present a phylogenomic study of Brosimum (Moraceae) and the allied genera Trymatococcus and Helianthostylis, with near‐complete taxon sampling. Distributed from Mexico and the Greater Antilles to the Amazon, this clade contains the underutilized crop ramón (bread nut) (Brosimum alicastrum) as well as other species valued for timber or medicinal uses. Target enrichment for 333 genes produced a well‐resolved phylogenetic tree and showed that Trymatococcus and Helianthostylis are nested within Brosimum. We present a revised subgeneric classification of Brosimum (19 spp.) based on phylogenetic and morphological considerations, including the reduction of Trymatococcus and Helianthostylis to subgenera. The monophyletic subgenera can be diagnosed based on stipule, pistillode, and cotyledon synapomorphies. Divergence date estimates suggest a Miocene origin for Brosimum, and ancestral area reconstruction indicated that all four subgenera originated and initially diversified in Amazonia before dispersing into other parts of South and Central America.

ACS Style

Elliot M. Gardner; Lauren Audi; Qian Zhang; Hervé Sauquet; Alexandre K. Monro; Nyree J.C. Zerega. Phylogenomics of Brosimum (Moraceae) and allied genera, including a revised subgeneric system. TAXON 2021, 1 .

AMA Style

Elliot M. Gardner, Lauren Audi, Qian Zhang, Hervé Sauquet, Alexandre K. Monro, Nyree J.C. Zerega. Phylogenomics of Brosimum (Moraceae) and allied genera, including a revised subgeneric system. TAXON. 2021; ():1.

Chicago/Turabian Style

Elliot M. Gardner; Lauren Audi; Qian Zhang; Hervé Sauquet; Alexandre K. Monro; Nyree J.C. Zerega. 2021. "Phylogenomics of Brosimum (Moraceae) and allied genera, including a revised subgeneric system." TAXON , no. : 1.

Journal article
Published: 03 March 2020 in Plants
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The tissue culture regeneration system of Lupinus albus has always been considered as recalcitrant material due to its genotype-dependent response and low regeneration efficiency that hamper the use of genetic engineering. Establishment of repeatable plant regeneration protocol is a prerequisite tool for successful application of genetic engineering. This aim of this study was to develop standardized, efficient protocol for successful shoot induction from cotyledonary node of white lupin. In this study, 5 day old aseptically cultured seedlings were used to prepare three explants (half cotyledonary node, HCN; whole cotyledonary node, WCN; and traditional cotyledonary node, TCN), cultured on four concentrations of M519 medium (M519, ½ M519, 1/3 M519, and ¼ M519), containing four carbohydrate sources (sucrose, fructose, maltose, and glucose), and stimulated with various combinations of KT (kinetin), and NAA (naphthalene acetic acid) for direct shoot regeneration. High frequency of 80% shoot regeneration was obtained on ½ M519 medium (KT 4.0 mg L−1 + NAA 0.1 mg L−1) by using HCN as an explant. Interestingly, combinations of (KT 4.0 mg L−1 + NAA 0.1 mg L−1 + BAP 1.67 mg L−1), and (KT 2.0 mg L−1 + NAA 0.1 mg L−1) showed similar shoot regeneration frequency of 60%. Augmentation of 0.25 g L−1 activated charcoal (AC) not only reduced browning effect but also improved shoot elongation. Among the all carbohydrate sources, sucrose showed the highest regeneration frequency with HCN. Additionally, 80% rooting frequency was recorded on ½ M519 containing IAA 1.0 mg L−1 + KT 0.1 mg L−1 (indole acetic acid) after 28 days of culturing. The present study describes establishment of an efficient and successful protocol for direct plant regeneration of white lupin from different cotyledonary nodes.

ACS Style

Mehtab Muhammad Aslam; Joseph K. Karanja; Qian Zhang; Huifeng Lin; Tianyu Xia; Kashif Akhtar; Jianping Liu; Rui Miao; Feiyun Xu; Weifeng Xu. In Vitro Regeneration Potential of White Lupin (Lupinus albus) from Cotyledonary Nodes. Plants 2020, 9, 318 .

AMA Style

Mehtab Muhammad Aslam, Joseph K. Karanja, Qian Zhang, Huifeng Lin, Tianyu Xia, Kashif Akhtar, Jianping Liu, Rui Miao, Feiyun Xu, Weifeng Xu. In Vitro Regeneration Potential of White Lupin (Lupinus albus) from Cotyledonary Nodes. Plants. 2020; 9 (3):318.

Chicago/Turabian Style

Mehtab Muhammad Aslam; Joseph K. Karanja; Qian Zhang; Huifeng Lin; Tianyu Xia; Kashif Akhtar; Jianping Liu; Rui Miao; Feiyun Xu; Weifeng Xu. 2020. "In Vitro Regeneration Potential of White Lupin (Lupinus albus) from Cotyledonary Nodes." Plants 9, no. 3: 318.

Journal article
Published: 26 February 2020 in Nature Communications
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White lupin (Lupinus albus) is a legume crop that develops cluster roots and has high phosphorus (P)-use efficiency (PUE) in low-P soils. Here, we assemble the genome of white lupin and find that it has evolved from a whole-genome triplication (WGT) event. We then decipher its diploid ancestral genome and reconstruct the three sub-genomes. Based on the results, we further reveal the sub-genome dominance and the genic expression of the different sub-genomes varying in relation to their transposable element (TE) density. The PUE genes in white lupin have been expanded through WGT as well as tandem and dispersed duplications. Furthermore, we characterize four main pathways for high PUE, which include carbon fixation, cluster root formation, soil-P remobilization, and cellular-P reuse. Among these, auxin modulation may be important for cluster root formation through involvement of potential genes LaABCG36s and LaABCG37s. These findings provide insights into the genome evolution and low-P adaptation of white lupin.

ACS Style

Weifeng Xu; Qian Zhang; Wei Yuan; Feiyun Xu; Mehtab Muhammad Aslam; Rui Miao; Ying Li; Qianwen Wang; Xing Li; Xin Zhang; Kang Zhang; Tianyu Xia; Feng Cheng. The genome evolution and low-phosphorus adaptation in white lupin. Nature Communications 2020, 11, 1 -13.

AMA Style

Weifeng Xu, Qian Zhang, Wei Yuan, Feiyun Xu, Mehtab Muhammad Aslam, Rui Miao, Ying Li, Qianwen Wang, Xing Li, Xin Zhang, Kang Zhang, Tianyu Xia, Feng Cheng. The genome evolution and low-phosphorus adaptation in white lupin. Nature Communications. 2020; 11 (1):1-13.

Chicago/Turabian Style

Weifeng Xu; Qian Zhang; Wei Yuan; Feiyun Xu; Mehtab Muhammad Aslam; Rui Miao; Ying Li; Qianwen Wang; Xing Li; Xin Zhang; Kang Zhang; Tianyu Xia; Feng Cheng. 2020. "The genome evolution and low-phosphorus adaptation in white lupin." Nature Communications 11, no. 1: 1-13.