111
[J]. Nature, 2000, 403(6772): 913-916.
[44] SCHOPFER C R , NASRALLAH M E, NASRALLA J B. The male
determinant of lf-incompatibility in Brassica [J]. Science, 1999, 286(5445): 1697-1700.
[45] GIRANTON J-L, DUMAS C, COCK J M, et al. The integral
membrane S -locus receptor kina of Brassica has rine/threonine kina activity in a membranous environment and spontaneously forms oligomers in planta [J]. PNAS, 2000, 97(7): 3759-3764.[46] MA R, HAN Z, HU Z, et al. Structural basis for specific lf-incompatibility respon in Brassica [J]. Cell Res, 2016, 26(12): 1320-1329.
[47] CABRILLAC D, MARK COCK J, DUMAS C, et al. The S -locus
receptor kina is inhibited by thioredoxins and activated by pollen
coat proteins [J]. Nature, 2001, 410(6825): 220-223.
[48] CHAE K, LORD E M. Pollen tube growth and guidance: roles of
small, creted proteins [J]. Ann Bot, 2011, 108(4): 627-636.[49] OKUDA S, TSUTSUI H, SHIINA K, et al. Defensin-like
polypeptide LUREs are pollen tube attractants creted from synergid cells [J]. Nature, 2009, 458(7236): 357-361.
[50] TAKEUCHI H, HIGASHIYAMA T. A species-specific cluster of
defensin-like genes encodes diffusible pollen tube attractants in
Arabidopsis [J]. PLoS Biol, 2012, 10(12): e1001449.
[51] ZHONG S, LIU M, WANG Z, et al. Cysteine-rich peptides promote
interspecific genetic isolation in Arabidopsis [J]. Science, 2019, 364(6443): eaau9564.
顿河马
圣诞玫瑰Peptides regulators in plant reproduction SUN Xiang, CHENG Lijun, LIU Zhiwen, LI Chao
School of Life Sciences, East China Normal University, Shanghai 200241, China
Abstract Plant peptides have been identified as important regulators in many process of plant growth and development for nearly 30 years. Peptide regulators majorly function in cell-cell communications at very low concentrations. In angiosperms, many class of peptides have been identified involved in the complex male-female interactions. Here, we introduce the function of the peptide families acting in the pollen-pistil interactions and summarize the progress focusing on the signal transduction and evolution of the peptides.
Key words plant peptide, plant reproduction, male-female interaction, signal transduction
梦见盘子
(编辑：段艳芳)
休闲度假“毅力”号火星着陆!幸福的终点站
美国“毅力”号火星车于2021年2月18日在火星成功着陆，将寻找火星上可能存在过的生命迹象。
据美国航天局介绍，“毅力”号于美国东部时间18日15时48分许(北京时间19日4时48分许)进入火星大气层，在7 min 内完成进入、下降和着陆，于15时55分许在火星赤道以北的耶泽罗陨石坑着陆。随后，任务团队在社交媒体上公布了“毅力”号登陆火星后拍摄并传回地球的第一张照片。
美国航天局表示，“毅力”号成功完成火星着陆，但其探索火星的任
自然信息
务才刚刚开始。未来数周“毅力”号将进行一系列测试，随后开始对耶泽罗陨石坑长达两年的探测任务。
小孩怎样退烧快美国航天局副局长托马斯•楚比兴表示，“毅力”号是美国航天局迄今为止最宏大的火星车探测任务，主要任务是寻找火星上是否存在过生命迹象。为找到答案，任务团队为“毅力”号在耶泽罗陨石坑着陆做了最充分准备，这个区域也是有史以来探测器登陆火星最艰难的区域。
“毅力”号于2020年7月30日从美国佛罗里达州卡纳维拉尔角空军基地升空，在历经203天飞行后抵达火星。“毅力”号是美国航天局造访火星表面的第九个探测器，其任务包括寻
找火星远古时期可能存在过的生命迹象，探索火星的地质和气候特征，为未来人类探索和登陆火星探路等。
据美国航天局介绍，“毅力”号将是首个从火星采样以供送回地球的探测器，它从火星上采集的岩石和土壤样本未来将在其他火星探测任务中被带回地球。
奶粉怎么做出来的首架火星直升机“机智”号随“毅力”号一同在火星着陆。“机智”号成为首架在其他行星飞行的直升机，任务团队将通过它验证在火星大气层飞行所需要的技术，为研发未来机器人或人类探索火星时携带的先进飞行器打下基础。
量子波动速读[吴玉 编译]
