BABY BOOM regulates early embryo and endosperm development

被引：60

作者：

Chen, Baojian ^{[1
]}

Maas, Lena ^{[1
,2
]}

Figueiredo, Duarte ^{[3
]}

Zhong, Yu ^{[4
]}

Reis, Ricardo ^{[1
]}

Li, Mengran ^{[1
,2
]}

Horstman, Anneke ^{[1
,2
]}

Riksen, Tjitske ^{[1
]}

Weemen, Mieke ^{[1
]}

Liu, Hang ^{[2
]}

Siemons, Charlotte ^{[1
,2
]}

Chen, Shaojiang ^{[4
]}

Angenent, Gerco C. ^{[1
,2
]}

Boutilier, Kim ^{[1
]}

机构：

[1] Wageningen Univ & Res, Biosci, NL-6700 AA Wageningen, Netherlands

[2] Wageningen Univ & Res, Lab Mol Biol, NL-6700 AP Wageningen, Netherlands

[3] Max Planck Inst Mol Plant Physiol, D-14476 Potsdam, Germany

[4] China Agr Univ, Coll Agron & Biotechnol, Natl Maize Improvement Ctr China,Minist Educ, Key Lab Crop Heterosis & Utilizat,Engn Res Ctr Ma, Beijing 100193, Peoples R China

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2022年 / 119卷 / 25期

关键词：

Arabidopsis; BABY BOOM; endosperm; parthenogenesis; zygotic embryo; TRANSCRIPTION FACTOR; HAPLOID INDUCTION; SEED DEVELOPMENT; GENE-EXPRESSION; PARTHENOGENESIS GENE; TOMATO HAPLOIDS; ARABIDOPSIS; EMBRYOGENESIS; TRANSFORMATION; PHOSPHOLIPASE;

D O I：

10.1073/pnas.2201761119

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The BABY BOOM (BBM) AINTEGUMENTA-LIKE (AIL) AP2/ERF domain transcription factor is a major regulator of plant cell totipotency, as it induces asexual embryo formation when ectopically expressed. Surprisingly, only limited information is available on the role of BBM during zygotic embryogenesis. Here we reexamined BBM expression and function in the model plant Arabidopsis thaliana (Arabidopsis) using reporter analysis and newly developed CRISPR mutants. BBM was expressed in the embryo from the zygote stage and also in the maternal (nucellus) and filial (endosperm) seed tissues. Analysis of CRISPR mutant alleles for BBM (bbm-cr) and the redundantly acting AIL gene PLETHORA2 (PLT2) (plt2-cr) uncovered individual roles for these genes in the timing of embryo progression. We also identified redundant roles for BBM and PLT2 in endosperm proliferation and cellularization and the maintenance of zygotic embryo development. Finally, we show that ectopic BBM expression in the egg cell of Arabidopsis and the dicot crops Brassica napus and Solanum lycopersicon is sufficient to bypass the fertilization requirement for embryo development. Together these results highlight roles for BBM and PLT2 in seed development and demonstrate the utility of BBM genes for engineering asexual embryo development in dicot species.

引用

页数：12

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